Finding the Fourth Proportional to 16,217.69, 22,379.49 and 9,143.69

Step by Step Solution

1. Step 1: Write the proportion equation
   16,217.69 : 22,379.49 = 9,143.69 : x
2. Step 2: Convert to fraction form
   16,217.69/22,379.49 = 9,143.69/x
3. Step 3: Cross multiply
   16,217.69x = 22,379.49 × 9,143.69
4. Step 4: Simplify right side
   16,217.69x = 204,631,007.02
5. Step 5: Solve for x
   x = 204,631,007.02/16,217.69
6. Step 6: Final answer
   x = 12,617.77