Finding the Fourth Proportional to 57,020.16, 78,686.28 and 31,874.52

Step by Step Solution

1. Step 1: Write the proportion equation
   57,020.16 : 78,686.28 = 31,874.52 : x
2. Step 2: Convert to fraction form
   57,020.16/78,686.28 = 31,874.52/x
3. Step 3: Cross multiply
   57,020.16x = 78,686.28 × 31,874.52
4. Step 4: Simplify right side
   57,020.16x = 2,508,087,405.59
5. Step 5: Solve for x
   x = 2,508,087,405.59/57,020.16
6. Step 6: Final answer
   x = 43,985.98