Finding the Fourth Proportional to 57,059.40, 78,738.42 and 31,565.16

Step by Step Solution

1. Step 1: Write the proportion equation
   57,059.40 : 78,738.42 = 31,565.16 : x
2. Step 2: Convert to fraction form
   57,059.40/78,738.42 = 31,565.16/x
3. Step 3: Cross multiply
   57,059.40x = 78,738.42 × 31,565.16
4. Step 4: Simplify right side
   57,059.40x = 2,485,390,825.45
5. Step 5: Solve for x
   x = 2,485,390,825.45/57,059.40
6. Step 6: Final answer
   x = 43,557.96