Finding the Fourth Proportional to 90,439.24, 134,805.76 and 83,710.56

Step by Step Solution

1. Step 1: Write the proportion equation
   90,439.24 : 134,805.76 = 83,710.56 : x
2. Step 2: Convert to fraction form
   90,439.24/134,805.76 = 83,710.56/x
3. Step 3: Cross multiply
   90,439.24x = 134,805.76 × 83,710.56
4. Step 4: Simplify right side
   90,439.24x = 11,284,665,660.83
5. Step 5: Solve for x
   x = 11,284,665,660.83/90,439.24
6. Step 6: Final answer
   x = 124,776.21