Finding the Fourth Proportional to 57,155.62, 78,877.72 and 31,664.78

Step by Step Solution

1. Step 1: Write the proportion equation
   57,155.62 : 78,877.72 = 31,664.78 : x
2. Step 2: Convert to fraction form
   57,155.62/78,877.72 = 31,664.78/x
3. Step 3: Cross multiply
   57,155.62x = 78,877.72 × 31,664.78
4. Step 4: Simplify right side
   57,155.62x = 2,497,645,650.70
5. Step 5: Solve for x
   x = 2,497,645,650.70/57,155.62
6. Step 6: Final answer
   x = 43,699.04