Physics education research, electronic materials, and the musings of Christopher Moore, Ph.D.

Four forces are acting simultaneously on a sack,Their magnitude are given as 200N.150N,175N,250N.THE ANGLE B/W 200N AND 150N IS 64DEGREE, AND B/W 150N AND 175N IS 59DEGREE AND B/W 175N AND 250N IS 74DEGREE.FIND THE RESULTANT FORCE ACTING ON THE SACK?

i need immediate assistance with explanation...