A house painter is standing on a uniform, horizontal platform that is held in equilibrium by two cables attached to supports on the roof $($as shown in the figure below$).$ The painter has a mass of $72\mathrm{.}9$ kg and the mass of the platform is $18\mathrm{.}0$ kg $.$ The distance from the left end of the platform to where the painter is standing is $d=1\mathrm{.}92m$ and the total length of the platform is $4\mathrm{.}78$ m $.$ How large is the force exerted by the left$-$hand cable on the platform?

$($in N$)$

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