Finding the Third Proportional to 31,286.25 and 63,659.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,286.25 : 63,659.25 = 63,659.25 : x
2. Step 2: Convert to fraction form
   31,286.25/63,659.25 = 63,659.25/x
3. Step 3: Cross multiply
   31,286.25x = 63,659.25 × 63,659.25
4. Step 4: Simplify right side
   31,286.25x = 4,052,500,110.56
5. Step 5: Solve for x
   x = 4,052,500,110.56/31,286.25
6. Step 6: Final answer
   x = 129,529.75