Finding the Fourth Proportional to 16,217.55, 22,375.85 and 12,864.15

Step by Step Solution

1. Step 1: Write the proportion equation
   16,217.55 : 22,375.85 = 12,864.15 : x
2. Step 2: Convert to fraction form
   16,217.55/22,375.85 = 12,864.15/x
3. Step 3: Cross multiply
   16,217.55x = 22,375.85 × 12,864.15
4. Step 4: Simplify right side
   16,217.55x = 287,846,226.46
5. Step 5: Solve for x
   x = 287,846,226.46/16,217.55
6. Step 6: Final answer
   x = 17,749.06