Replace the force system by a single force resultant and specify its point of application, measured along the x axis from point P.
Given:
{ F }_{ 1 } = 125 Ib\quad a = 2 ft
{ F }_{ 2 } = 350 Ib\quad b = 6 ft
{ F }_{ 3 } = 850 Ib\quad c = 3 ft
\quad \quad \quad\quad\quad\quad d = 4 ft