Finding the Third Proportional to 397,133,647.50 and 865,773,693.50

Step by Step Solution

1. Step 1: Write the proportion equation
   397,133,647.50 : 865,773,693.50 = 865,773,693.50 : x
2. Step 2: Convert to fraction form
   397,133,647.50/865,773,693.50 = 865,773,693.50/x
3. Step 3: Cross multiply
   397,133,647.50x = 865,773,693.50 × 865,773,693.50
4. Step 4: Simplify right side
   397,133,647.50x = 749,564,088,356,631,936
5. Step 5: Solve for x
   x = 749,564,088,356,631,936/397,133,647.50
6. Step 6: Final answer
   x = 1,887,435,358.54