Finding the Fourth Proportional to 57,187.42, 78,924.15 and 31,699.31

Step by Step Solution

1. Step 1: Write the proportion equation
   57,187.42 : 78,924.15 = 31,699.31 : x
2. Step 2: Convert to fraction form
   57,187.42/78,924.15 = 31,699.31/x
3. Step 3: Cross multiply
   57,187.42x = 78,924.15 × 31,699.31
4. Step 4: Simplify right side
   57,187.42x = 2,501,840,702.72
5. Step 5: Solve for x
   x = 2,501,840,702.72/57,187.42
6. Step 6: Final answer
   x = 43,748.10