Finding the Third Proportional to 311,529,510 and 664,755,820

Step by Step Solution

1. Step 1: Write the proportion equation
   311,529,510 : 664,755,820 = 664,755,820 : x
2. Step 2: Convert to fraction form
   311,529,510/664,755,820 = 664,755,820/x
3. Step 3: Cross multiply
   311,529,510x = 664,755,820 × 664,755,820
4. Step 4: Simplify right side
   311,529,510x = 441,900,300,223,872,384
5. Step 5: Solve for x
   x = 441,900,300,223,872,384/311,529,510
6. Step 6: Final answer
   x = 1,418,486,165.96