Finding the Fourth Proportional to 99,760.43, 149,447.67 and 83,557.59

Step by Step Solution

1. Step 1: Write the proportion equation
   99,760.43 : 149,447.67 = 83,557.59 : x
2. Step 2: Convert to fraction form
   99,760.43/149,447.67 = 83,557.59/x
3. Step 3: Cross multiply
   99,760.43x = 149,447.67 × 83,557.59
4. Step 4: Simplify right side
   99,760.43x = 12,487,487,136.32
5. Step 5: Solve for x
   x = 12,487,487,136.32/99,760.43
6. Step 6: Final answer
   x = 125,174.76