Finding the Fourth Proportional to 16,578.72, 22,879.68 and 9,507.60

Step by Step Solution

1. Step 1: Write the proportion equation
   16,578.72 : 22,879.68 = 9,507.60 : x
2. Step 2: Convert to fraction form
   16,578.72/22,879.68 = 9,507.60/x
3. Step 3: Cross multiply
   16,578.72x = 22,879.68 × 9,507.60
4. Step 4: Simplify right side
   16,578.72x = 217,530,845.57
5. Step 5: Solve for x
   x = 217,530,845.57/16,578.72
6. Step 6: Final answer
   x = 13,121.09