Finding the Fourth Proportional to 16,456.61, 22,705.57 and 9,555.28

Step by Step Solution

1. Step 1: Write the proportion equation
   16,456.61 : 22,705.57 = 9,555.28 : x
2. Step 2: Convert to fraction form
   16,456.61/22,705.57 = 9,555.28/x
3. Step 3: Cross multiply
   16,456.61x = 22,705.57 × 9,555.28
4. Step 4: Simplify right side
   16,456.61x = 216,958,078.91
5. Step 5: Solve for x
   x = 216,958,078.91/16,456.61
6. Step 6: Final answer
   x = 13,183.64