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Using Equation for circles and solving the above figure

  x =

Wiki Markup\{ ( \ [ (d1^2-d2^2) + (i2^2-i1^2) + (j2^2-j1^2) \ ] * (2*j3-2*j2) - \ [ (d2^2-d3^2) + (i3^2-i2^2) + (j3^2-j2^2) \ ] \ *(2*j2-2*j1) ) /         \[ /
        [ (2*i2-2*i3)(2*j2-2*j1)-(2*i1-2*i2)(2*j3-2*j2 \ ] \ }

Wiki Markup y = \[  y = [ (d1^2-d2^2) + (i2^2-i1^2) + (j2^2-j1^2) + x*(2*i1-2*i2)\] / (2*j2-2*j1)

x,y are the required coordinates of a Point (Target)

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