Finding the Fourth Proportional to 150,737.40, 207,945.72 and 90,279

Step by Step Solution

1. Step 1: Write the proportion equation
   150,737.40 : 207,945.72 = 90,279 : x
2. Step 2: Convert to fraction form
   150,737.40/207,945.72 = 90,279/x
3. Step 3: Cross multiply
   150,737.40x = 207,945.72 × 90,279
4. Step 4: Simplify right side
   150,737.40x = 18,773,131,655.88
5. Step 5: Solve for x
   x = 18,773,131,655.88/150,737.40
6. Step 6: Final answer
   x = 124,541.96