OK, here goes.

I hope this works, looking for the values of x and k.

Equation 1:

kx + 648.56x - 30.8k = 43293.752

Equation 2:

-28.2kx - 28.2xy + 868.56k + 4480.98x + 868.56y = 264247.368

Where y = 1.8 / sin (tan-1 ((x-30.8) / (k-12.1)) )

Thanks