Finding the Third Proportional to 31,313 and 63,719

Step by Step Solution

1. Step 1: Write the proportion equation
   31,313 : 63,719 = 63,719 : x
2. Step 2: Convert to fraction form
   31,313/63,719 = 63,719/x
3. Step 3: Cross multiply
   31,313x = 63,719 × 63,719
4. Step 4: Simplify right side
   31,313x = 4,060,110,961
5. Step 5: Solve for x
   x = 4,060,110,961/31,313
6. Step 6: Final answer
   x = 129,662.15