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Please help with algorithm for getting radius (L) and center decimal coordinates (X) of blue circle.

Drawing here

Following points are given:

c1 = 56.963022,24.640274 r1 = 6km
c2 = 56.878324,24.490585 r2 = 5km
c3 = 56.870819,24.746017 r3 = 8km

Answer should be in following format:
X = XX.XXXXXX;
L = X.XX km

PS. I need this for creating software for my Master's work and I am a web programmer, not mathematician, so please try not to use very scientific language :)

Thanks!

1 Answers 1