Finding the Fourth Proportional to 72,049.48, 99,426.21 and 40,217.69

Step by Step Solution

1. Step 1: Write the proportion equation
   72,049.48 : 99,426.21 = 40,217.69 : x
2. Step 2: Convert to fraction form
   72,049.48/99,426.21 = 40,217.69/x
3. Step 3: Cross multiply
   72,049.48x = 99,426.21 × 40,217.69
4. Step 4: Simplify right side
   72,049.48x = 3,998,692,491.65
5. Step 5: Solve for x
   x = 3,998,692,491.65/72,049.48
6. Step 6: Final answer
   x = 55,499.26