Finding the Third Proportional to 639,132 and 1,398,534

Step by Step Solution

1. Step 1: Write the proportion equation
   639,132 : 1,398,534 = 1,398,534 : x
2. Step 2: Convert to fraction form
   639,132/1,398,534 = 1,398,534/x
3. Step 3: Cross multiply
   639,132x = 1,398,534 × 1,398,534
4. Step 4: Simplify right side
   639,132x = 1,955,897,349,156
5. Step 5: Solve for x
   x = 1,955,897,349,156/639,132
6. Step 6: Final answer
   x = 3,060,240.06