I tried finding the answer by working out the problem, but my answer keeps coming out wrong. Can you show me the steps?

A baseball fan sitting in the "cheap seats" is d = 126 m from home plate (see the figure below). How much time elapses between the instant the fan sees a batter hit the ball and the moment the fan hears the sound? (Assume the speed of sound is 344 m/s, and the vertical distance can be ignored.) Ll S,_____. .