Finding the Fourth Proportional to 72,719.10, 109,042.20 and 33,231.60

Step by Step Solution

1. Step 1: Write the proportion equation
   72,719.10 : 109,042.20 = 33,231.60 : x
2. Step 2: Convert to fraction form
   72,719.10/109,042.20 = 33,231.60/x
3. Step 3: Cross multiply
   72,719.10x = 109,042.20 × 33,231.60
4. Step 4: Simplify right side
   72,719.10x = 3,623,646,773.52
5. Step 5: Solve for x
   x = 3,623,646,773.52/72,719.10
6. Step 6: Final answer
   x = 49,830.74