Finding the Fourth Proportional to 78,702.52, 108,609.56 and 42,892.56

Step by Step Solution

1. Step 1: Write the proportion equation
   78,702.52 : 108,609.56 = 42,892.56 : x
2. Step 2: Convert to fraction form
   78,702.52/108,609.56 = 42,892.56/x
3. Step 3: Cross multiply
   78,702.52x = 108,609.56 × 42,892.56
4. Step 4: Simplify right side
   78,702.52x = 4,658,542,068.87
5. Step 5: Solve for x
   x = 4,658,542,068.87/78,702.52
6. Step 6: Final answer
   x = 59,191.78