Finding the Fourth Proportional to 641,822.78, 962,935.59 and 385,949.86

Step by Step Solution

1. Step 1: Write the proportion equation
   641,822.78 : 962,935.59 = 385,949.86 : x
2. Step 2: Convert to fraction form
   641,822.78/962,935.59 = 385,949.86/x
3. Step 3: Cross multiply
   641,822.78x = 962,935.59 × 385,949.86
4. Step 4: Simplify right side
   641,822.78x = 371,644,856,149.52
5. Step 5: Solve for x
   x = 371,644,856,149.52/641,822.78
6. Step 6: Final answer
   x = 579,045.91