Finding the Fourth Proportional to 80,151.39, 120,445.18 and 42,737.90

Step by Step Solution

1. Step 1: Write the proportion equation
   80,151.39 : 120,445.18 = 42,737.90 : x
2. Step 2: Convert to fraction form
   80,151.39/120,445.18 = 42,737.90/x
3. Step 3: Cross multiply
   80,151.39x = 120,445.18 × 42,737.90
4. Step 4: Simplify right side
   80,151.39x = 5,147,573,349.25
5. Step 5: Solve for x
   x = 5,147,573,349.25/80,151.39
6. Step 6: Final answer
   x = 64,223.13