Finding the Fourth Proportional to 12,149.49, 18,229.78 and 5,487.77

Step by Step Solution

1. Step 1: Write the proportion equation
   12,149.49 : 18,229.78 = 5,487.77 : x
2. Step 2: Convert to fraction form
   12,149.49/18,229.78 = 5,487.77/x
3. Step 3: Cross multiply
   12,149.49x = 18,229.78 × 5,487.77
4. Step 4: Simplify right side
   12,149.49x = 100,040,785.89
5. Step 5: Solve for x
   x = 100,040,785.89/12,149.49
6. Step 6: Final answer
   x = 8,234.16