In order to solve this problem, use the following equations and steps shown: \begin{align} &\cssId{Step1}{ΣF_{verticals} = 0}\\[3px] &\cssId{Step2}{N_P = mg}\\[3px] &\cssId{Step3}{ΣM(G) = 0}\\[3px] &\cssId{Step4}{Fh-N_{P}·x = 0}\\[3px] &\cssId{Step5}{F = \frac{mgx}{h} }\\[3px] &\cssId{Step6}{F = \frac{mgx}{\sqrt{L^2-x^2}} }\\[3px] \end{align}