I hit a pedestrian who is at fault? ?

I was driving down street “a” traveling east bound there are two lanes and I was on the right lane there was a Lexus on my left side traveling also east bound he was about half a car length in front of me we had a green light and we entered the intersection down street “a” crossing street “b” and as we are nearly at the other side of the intersection I felt a strong hit on the front left of my car that threw me to the right side which was the curb, I slammed on my brakes immediately because my car was headed straight onto the curb, an elementary fence, and a pedestrian. there was a pedestrian on the corner waiting to cross my vehicle made contact with him when my car finally stopped. He got caught between the fence of the elementary and my car but thank god the fence was small and ended up knocking over so there was no damage to him on his upper half body nor did my car go over the pedestrian he did hurt his leg because it got caught between the fence and the bottom of my bumper. Anyway the Lexus had swerved into my lane as we were crossing the intersection and hit my car. there were cars on street “a” on the left lane facing westbound trying to turn into “street b” southbound. He says the car on the left lane began turning as we entered the intersection. The car never stopped the car also never made contact with the Lexus that hit me. The only damage to the Lexus was on the back right side where he hit the front left of my car causing me to hit the pedestrian.