Finding the Fourth Proportional to 57,065.56, 78,750.42 and 31,915

Step by Step Solution

1. Step 1: Write the proportion equation
   57,065.56 : 78,750.42 = 31,915 : x
2. Step 2: Convert to fraction form
   57,065.56/78,750.42 = 31,915/x
3. Step 3: Cross multiply
   57,065.56x = 78,750.42 × 31,915
4. Step 4: Simplify right side
   57,065.56x = 2,513,319,654.30
5. Step 5: Solve for x
   x = 2,513,319,654.30/57,065.56
6. Step 6: Final answer
   x = 44,042.67