Finding the Fourth Proportional to 90,061.99, 135,092.79 and 84,581.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,061.99 : 135,092.79 = 84,581.50 : x
2. Step 2: Convert to fraction form
   90,061.99/135,092.79 = 84,581.50/x
3. Step 3: Cross multiply
   90,061.99x = 135,092.79 × 84,581.50
4. Step 4: Simplify right side
   90,061.99x = 11,426,350,479.65
5. Step 5: Solve for x
   x = 11,426,350,479.65/90,061.99
6. Step 6: Final answer
   x = 126,872.07