Finding the Fourth Proportional to 78,702.88, 108,606.76 and 42,892.12

Step by Step Solution

1. Step 1: Write the proportion equation
   78,702.88 : 108,606.76 = 42,892.12 : x
2. Step 2: Convert to fraction form
   78,702.88/108,606.76 = 42,892.12/x
3. Step 3: Cross multiply
   78,702.88x = 108,606.76 × 42,892.12
4. Step 4: Simplify right side
   78,702.88x = 4,658,374,182.73
5. Step 5: Solve for x
   x = 4,658,374,182.73/78,702.88
6. Step 6: Final answer
   x = 59,189.37