Finding the Fourth Proportional to 78,540.52, 108,385.06 and 42,729.96

Step by Step Solution

1. Step 1: Write the proportion equation
   78,540.52 : 108,385.06 = 42,729.96 : x
2. Step 2: Convert to fraction form
   78,540.52/108,385.06 = 42,729.96/x
3. Step 3: Cross multiply
   78,540.52x = 108,385.06 × 42,729.96
4. Step 4: Simplify right side
   78,540.52x = 4,631,289,278.40
5. Step 5: Solve for x
   x = 4,631,289,278.40/78,540.52
6. Step 6: Final answer
   x = 58,966.88