Finding the Fourth Proportional to 57,216.50, 78,963.42 and 31,725.39

Step by Step Solution

1. Step 1: Write the proportion equation
   57,216.50 : 78,963.42 = 31,725.39 : x
2. Step 2: Convert to fraction form
   57,216.50/78,963.42 = 31,725.39/x
3. Step 3: Cross multiply
   57,216.50x = 78,963.42 × 31,725.39
4. Step 4: Simplify right side
   57,216.50x = 2,505,145,295.23
5. Step 5: Solve for x
   x = 2,505,145,295.23/57,216.50
6. Step 6: Final answer
   x = 43,783.62