Finding the Third Proportional to 31,292 and 63,670

Step by Step Solution

1. Step 1: Write the proportion equation
   31,292 : 63,670 = 63,670 : x
2. Step 2: Convert to fraction form
   31,292/63,670 = 63,670/x
3. Step 3: Cross multiply
   31,292x = 63,670 × 63,670
4. Step 4: Simplify right side
   31,292x = 4,053,868,900
5. Step 5: Solve for x
   x = 4,053,868,900/31,292
6. Step 6: Final answer
   x = 129,549.69