Finding the Third Proportional to 403,792,338 and 876,499,009.50

Step by Step Solution

1. Step 1: Write the proportion equation
   403,792,338 : 876,499,009.50 = 876,499,009.50 : x
2. Step 2: Convert to fraction form
   403,792,338/876,499,009.50 = 876,499,009.50/x
3. Step 3: Cross multiply
   403,792,338x = 876,499,009.50 × 876,499,009.50
4. Step 4: Simplify right side
   403,792,338x = 768,250,513,654,481,152
5. Step 5: Solve for x
   x = 768,250,513,654,481,152/403,792,338
6. Step 6: Final answer
   x = 1,902,588,140.87