The chicken eats the corn and the fox eats the chicken. Then he lets the fox on the rowboat and gets across.
Another way is that the man takes the chicken to the other side with him. Then, he leaves the chicken on the other side. He goes back to the other side and takes the corn to the other side,and drops it offf. Then he goes back and gets the fox. When he arrives on the other side, the fox, corn and chicken are there.
Hope this helps!