Finding the Fourth Proportional to 71,789.28, 99,072.72 and 43,497.60

Step by Step Solution

1. Step 1: Write the proportion equation
   71,789.28 : 99,072.72 = 43,497.60 : x
2. Step 2: Convert to fraction form
   71,789.28/99,072.72 = 43,497.60/x
3. Step 3: Cross multiply
   71,789.28x = 99,072.72 × 43,497.60
4. Step 4: Simplify right side
   71,789.28x = 4,309,425,545.47
5. Step 5: Solve for x
   x = 4,309,425,545.47/71,789.28
6. Step 6: Final answer
   x = 60,028.82