Find Force M Exerted by Muscle in Test Apparatus

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The discussion focuses on calculating the horizontal force M exerted by a flexor muscle on a forearm in a test apparatus, given a horizontal force |F| of 192 N. The torque generated by the force at a distance of L = 0.31 m is calculated to be 59.52 Nm. To find the force M at the second distance of h = 0.047 m, the sum of the moments about the elbow joint must equal zero, allowing for the establishment of an equation that balances the torques at both points.

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A person exerts a horizontal force |F| = 192 N in the test apparatus shown in the drawing. Find the horizontal force M (magnitude and direction) that is flexor muscle exerts on his forearm. (L = 0.31 m, h = 0.047 m)

http://img238.imageshack.us/img238/1465/c9p17iy6.jpg

I know that the torque for the .31m length is equal to 59.52 Nm; how do I begin to solve the force M for the second length of .047m?
 
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The sum of the moments about the elbow joint must = 0.
 
does this mean I can calculate the torque for both points and add them in an equation and set them equal to 0?
 

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