Finding the Fourth Proportional to 16,288.36, 22,478.85 and 9,118.10

Step by Step Solution

1. Step 1: Write the proportion equation
   16,288.36 : 22,478.85 = 9,118.10 : x
2. Step 2: Convert to fraction form
   16,288.36/22,478.85 = 9,118.10/x
3. Step 3: Cross multiply
   16,288.36x = 22,478.85 × 9,118.10
4. Step 4: Simplify right side
   16,288.36x = 204,964,458.38
5. Step 5: Solve for x
   x = 204,964,458.38/16,288.36
6. Step 6: Final answer
   x = 12,583.49