Finding the Fourth Proportional to 12,099.38, 18,142.38 and 8,150.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,099.38 : 18,142.38 = 8,150.42 : x
2. Step 2: Convert to fraction form
   12,099.38/18,142.38 = 8,150.42/x
3. Step 3: Cross multiply
   12,099.38x = 18,142.38 × 8,150.42
4. Step 4: Simplify right side
   12,099.38x = 147,868,062.16
5. Step 5: Solve for x
   x = 147,868,062.16/12,099.38
6. Step 6: Final answer
   x = 12,221.13