Finding the Third Proportional to 31,310.50 and 63,715

Step by Step Solution

1. Step 1: Write the proportion equation
   31,310.50 : 63,715 = 63,715 : x
2. Step 2: Convert to fraction form
   31,310.50/63,715 = 63,715/x
3. Step 3: Cross multiply
   31,310.50x = 63,715 × 63,715
4. Step 4: Simplify right side
   31,310.50x = 4,059,601,225
5. Step 5: Solve for x
   x = 4,059,601,225/31,310.50
6. Step 6: Final answer
   x = 129,656.22