Finding the Fourth Proportional to 16,128.26, 22,258.35 and 9,414.32

Step by Step Solution

1. Step 1: Write the proportion equation
   16,128.26 : 22,258.35 = 9,414.32 : x
2. Step 2: Convert to fraction form
   16,128.26/22,258.35 = 9,414.32/x
3. Step 3: Cross multiply
   16,128.26x = 22,258.35 × 9,414.32
4. Step 4: Simplify right side
   16,128.26x = 209,547,229.57
5. Step 5: Solve for x
   x = 209,547,229.57/16,128.26
6. Step 6: Final answer
   x = 12,992.55