Finding the Fourth Proportional to 57,981.52, 86,847.30 and 39,158.05

Step by Step Solution

1. Step 1: Write the proportion equation
   57,981.52 : 86,847.30 = 39,158.05 : x
2. Step 2: Convert to fraction form
   57,981.52/86,847.30 = 39,158.05/x
3. Step 3: Cross multiply
   57,981.52x = 86,847.30 × 39,158.05
4. Step 4: Simplify right side
   57,981.52x = 3,400,770,915.77
5. Step 5: Solve for x
   x = 3,400,770,915.77/57,981.52
6. Step 6: Final answer
   x = 58,652.67