Finding the Fourth Proportional to 16,919.82, 25,365.15 and 8,160.89

Step by Step Solution

1. Step 1: Write the proportion equation
   16,919.82 : 25,365.15 = 8,160.89 : x
2. Step 2: Convert to fraction form
   16,919.82/25,365.15 = 8,160.89/x
3. Step 3: Cross multiply
   16,919.82x = 25,365.15 × 8,160.89
4. Step 4: Simplify right side
   16,919.82x = 207,002,072.16
5. Step 5: Solve for x
   x = 207,002,072.16/16,919.82
6. Step 6: Final answer
   x = 12,234.30