Finding the Fourth Proportional to 150,406.72, 207,550.28 and 82,412.90

Step by Step Solution

1. Step 1: Write the proportion equation
   150,406.72 : 207,550.28 = 82,412.90 : x
2. Step 2: Convert to fraction form
   150,406.72/207,550.28 = 82,412.90/x
3. Step 3: Cross multiply
   150,406.72x = 207,550.28 × 82,412.90
4. Step 4: Simplify right side
   150,406.72x = 17,104,820,470.61
5. Step 5: Solve for x
   x = 17,104,820,470.61/150,406.72
6. Step 6: Final answer
   x = 113,723.78