Finding the Fourth Proportional to 16,308.61, 22,505.99 and 8,856.61

Step by Step Solution

1. Step 1: Write the proportion equation
   16,308.61 : 22,505.99 = 8,856.61 : x
2. Step 2: Convert to fraction form
   16,308.61/22,505.99 = 8,856.61/x
3. Step 3: Cross multiply
   16,308.61x = 22,505.99 × 8,856.61
4. Step 4: Simplify right side
   16,308.61x = 199,326,731.81
5. Step 5: Solve for x
   x = 199,326,731.81/16,308.61
6. Step 6: Final answer
   x = 12,222.18