Finding the Fourth Proportional to 72,440.55, 108,610.20 and 42,843.15

Step by Step Solution

1. Step 1: Write the proportion equation
   72,440.55 : 108,610.20 = 42,843.15 : x
2. Step 2: Convert to fraction form
   72,440.55/108,610.20 = 42,843.15/x
3. Step 3: Cross multiply
   72,440.55x = 108,610.20 × 42,843.15
4. Step 4: Simplify right side
   72,440.55x = 4,653,203,090.13
5. Step 5: Solve for x
   x = 4,653,203,090.13/72,440.55
6. Step 6: Final answer
   x = 64,234.78