Finding the Third Proportional to 639,516.50 and 923,914.50

Step by Step Solution

1. Step 1: Write the proportion equation
   639,516.50 : 923,914.50 = 923,914.50 : x
2. Step 2: Convert to fraction form
   639,516.50/923,914.50 = 923,914.50/x
3. Step 3: Cross multiply
   639,516.50x = 923,914.50 × 923,914.50
4. Step 4: Simplify right side
   639,516.50x = 853,618,003,310.25
5. Step 5: Solve for x
   x = 853,618,003,310.25/639,516.50
6. Step 6: Final answer
   x = 1,334,786.52