On the Subject of Pinpoint the Point

What's this red dot on me...

Initialize the following variables:

• x1=
• y1=
• x2=
• y2=
• x3=
• y3=
• D1=
• D2=
• D3=
• x=
• y=

For the first 9 values, input the x-coordinates and y-coordinates (from 1 to 10) of the points given on the module and the ditances given.

Initialize 6 more variables:

• d1=sqrt((x-x1)^2+(y-y1)^2)
• d2=sqrt((x-x2)^2+(y-y2)^2)
• d3=sqrt((x-x3)^2+(y-y3)^2)
• d1/D1
• d2/D2
• d3/D3

Try all possible combinations of x and y until all di/Di ratios (rounded to the 3rd decimal point) are equal.