Finding the Fourth Proportional to 16,658.91, 24,979.88 and 5,561.61

Step by Step Solution

1. Step 1: Write the proportion equation
   16,658.91 : 24,979.88 = 5,561.61 : x
2. Step 2: Convert to fraction form
   16,658.91/24,979.88 = 5,561.61/x
3. Step 3: Cross multiply
   16,658.91x = 24,979.88 × 5,561.61
4. Step 4: Simplify right side
   16,658.91x = 138,928,322.60
5. Step 5: Solve for x
   x = 138,928,322.60/16,658.91
6. Step 6: Final answer
   x = 8,339.58