Finding the Fourth Proportional to 150,405.72, 207,548.90 and 82,411.90

Step by Step Solution

1. Step 1: Write the proportion equation
   150,405.72 : 207,548.90 = 82,411.90 : x
2. Step 2: Convert to fraction form
   150,405.72/207,548.90 = 82,411.90/x
3. Step 3: Cross multiply
   150,405.72x = 207,548.90 × 82,411.90
4. Step 4: Simplify right side
   150,405.72x = 17,104,499,191.91
5. Step 5: Solve for x
   x = 17,104,499,191.91/150,405.72
6. Step 6: Final answer
   x = 113,722.40