Finding the Fourth Proportional to 57,139.39, 78,852.33 and 31,988.89

Step by Step Solution

1. Step 1: Write the proportion equation
   57,139.39 : 78,852.33 = 31,988.89 : x
2. Step 2: Convert to fraction form
   57,139.39/78,852.33 = 31,988.89/x
3. Step 3: Cross multiply
   57,139.39x = 78,852.33 × 31,988.89
4. Step 4: Simplify right side
   57,139.39x = 2,522,398,510.61
5. Step 5: Solve for x
   x = 2,522,398,510.61/57,139.39
6. Step 6: Final answer
   x = 44,144.65