Finding the Fourth Proportional to 647,959,144.42, 893,854,196.01 and 393,572,807.01

Step by Step Solution

1. Step 1: Write the proportion equation
   647,959,144.42 : 893,854,196.01 = 393,572,807.01 : x
2. Step 2: Convert to fraction form
   647,959,144.42/893,854,196.01 = 393,572,807.01/x
3. Step 3: Cross multiply
   647,959,144.42x = 893,854,196.01 × 393,572,807.01
4. Step 4: Simplify right side
   647,959,144.42x = 351,796,704,974,885,312
5. Step 5: Solve for x
   x = 351,796,704,974,885,312/647,959,144.42
6. Step 6: Final answer
   x = 542,930,380.73