Finding the Fourth Proportional to 16,561.92, 22,855.72 and 9,008.40

Step by Step Solution

1. Step 1: Write the proportion equation
   16,561.92 : 22,855.72 = 9,008.40 : x
2. Step 2: Convert to fraction form
   16,561.92/22,855.72 = 9,008.40/x
3. Step 3: Cross multiply
   16,561.92x = 22,855.72 × 9,008.40
4. Step 4: Simplify right side
   16,561.92x = 205,893,468.05
5. Step 5: Solve for x
   x = 205,893,468.05/16,561.92
6. Step 6: Final answer
   x = 12,431.74