Finding the Fourth Proportional to 16,608.69, 22,921.61 and 12,409.65

Step by Step Solution

1. Step 1: Write the proportion equation
   16,608.69 : 22,921.61 = 12,409.65 : x
2. Step 2: Convert to fraction form
   16,608.69/22,921.61 = 12,409.65/x
3. Step 3: Cross multiply
   16,608.69x = 22,921.61 × 12,409.65
4. Step 4: Simplify right side
   16,608.69x = 284,449,095.49
5. Step 5: Solve for x
   x = 284,449,095.49/16,608.69
6. Step 6: Final answer
   x = 17,126.52