Finding the Third Proportional to 639,561 and 923,983.50

Step by Step Solution

1. Step 1: Write the proportion equation
   639,561 : 923,983.50 = 923,983.50 : x
2. Step 2: Convert to fraction form
   639,561/923,983.50 = 923,983.50/x
3. Step 3: Cross multiply
   639,561x = 923,983.50 × 923,983.50
4. Step 4: Simplify right side
   639,561x = 853,745,508,272.25
5. Step 5: Solve for x
   x = 853,745,508,272.25/639,561
6. Step 6: Final answer
   x = 1,334,893.01