Finding the Third Proportional to 641,892.50 and 993,399

Step by Step Solution

1. Step 1: Write the proportion equation
   641,892.50 : 993,399 = 993,399 : x
2. Step 2: Convert to fraction form
   641,892.50/993,399 = 993,399/x
3. Step 3: Cross multiply
   641,892.50x = 993,399 × 993,399
4. Step 4: Simplify right side
   641,892.50x = 986,841,573,201
5. Step 5: Solve for x
   x = 986,841,573,201/641,892.50
6. Step 6: Final answer
   x = 1,537,393.84