Finding the Fourth Proportional to 1,123,188,759.71, 1,549,988,996.10 and 621,401,134.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123,188,759.71 : 1,549,988,996.10 = 621,401,134.61 : x
2. Step 2: Convert to fraction form
   1,123,188,759.71/1,549,988,996.10 = 621,401,134.61/x
3. Step 3: Cross multiply
   1,123,188,759.71x = 1,549,988,996.10 × 621,401,134.61
4. Step 4: Simplify right side
   1,123,188,759.71x = 963,164,920,811,130,496
5. Step 5: Solve for x
   x = 963,164,920,811,130,496/1,123,188,759.71
6. Step 6: Final answer
   x = 857,527,207.68