Finding the Fourth Proportional to 16,217.73, 22,379.10 and 9,145.89

Step by Step Solution

1. Step 1: Write the proportion equation
   16,217.73 : 22,379.10 = 9,145.89 : x
2. Step 2: Convert to fraction form
   16,217.73/22,379.10 = 9,145.89/x
3. Step 3: Cross multiply
   16,217.73x = 22,379.10 × 9,145.89
4. Step 4: Simplify right side
   16,217.73x = 204,676,786.90
5. Step 5: Solve for x
   x = 204,676,786.90/16,217.73
6. Step 6: Final answer
   x = 12,620.56