Finding the Fourth Proportional to 72,156.76, 108,209.18 and 42,181.24

Step by Step Solution

1. Step 1: Write the proportion equation
   72,156.76 : 108,209.18 = 42,181.24 : x
2. Step 2: Convert to fraction form
   72,156.76/108,209.18 = 42,181.24/x
3. Step 3: Cross multiply
   72,156.76x = 108,209.18 × 42,181.24
4. Step 4: Simplify right side
   72,156.76x = 4,564,397,391.78
5. Step 5: Solve for x
   x = 4,564,397,391.78/72,156.76
6. Step 6: Final answer
   x = 63,256.68