Finding the Fourth Proportional to 79,036.72, 109,070.42 and 42,737.90

Step by Step Solution

1. Step 1: Write the proportion equation
   79,036.72 : 109,070.42 = 42,737.90 : x
2. Step 2: Convert to fraction form
   79,036.72/109,070.42 = 42,737.90/x
3. Step 3: Cross multiply
   79,036.72x = 109,070.42 × 42,737.90
4. Step 4: Simplify right side
   79,036.72x = 4,661,440,702.92
5. Step 5: Solve for x
   x = 4,661,440,702.92/79,036.72
6. Step 6: Final answer
   x = 58,978.16