Finding the Fourth Proportional to 72,489.72, 108,762.24 and 28,147.58

Step by Step Solution

1. Step 1: Write the proportion equation
   72,489.72 : 108,762.24 = 28,147.58 : x
2. Step 2: Convert to fraction form
   72,489.72/108,762.24 = 28,147.58/x
3. Step 3: Cross multiply
   72,489.72x = 108,762.24 × 28,147.58
4. Step 4: Simplify right side
   72,489.72x = 3,061,393,851.38
5. Step 5: Solve for x
   x = 3,061,393,851.38/72,489.72
6. Step 6: Final answer
   x = 42,232.11