Finding the Fourth Proportional to 57,142.36, 78,854.72 and 31,647.71

Step by Step Solution

1. Step 1: Write the proportion equation
   57,142.36 : 78,854.72 = 31,647.71 : x
2. Step 2: Convert to fraction form
   57,142.36/78,854.72 = 31,647.71/x
3. Step 3: Cross multiply
   57,142.36x = 78,854.72 × 31,647.71
4. Step 4: Simplify right side
   57,142.36x = 2,495,571,349.59
5. Step 5: Solve for x
   x = 2,495,571,349.59/57,142.36
6. Step 6: Final answer
   x = 43,672.88