Finding the Fourth Proportional to 99,760.05, 149,447.12 and 83,557.22

Step by Step Solution

1. Step 1: Write the proportion equation
   99,760.05 : 149,447.12 = 83,557.22 : x
2. Step 2: Convert to fraction form
   99,760.05/149,447.12 = 83,557.22/x
3. Step 3: Cross multiply
   99,760.05x = 149,447.12 × 83,557.22
4. Step 4: Simplify right side
   99,760.05x = 12,487,384,719.18
5. Step 5: Solve for x
   x = 12,487,384,719.18/99,760.05
6. Step 6: Final answer
   x = 125,174.20