Finding the Fourth Proportional to 16,478.16, 22,736.40 and 9,404.40

Step by Step Solution

1. Step 1: Write the proportion equation
   16,478.16 : 22,736.40 = 9,404.40 : x
2. Step 2: Convert to fraction form
   16,478.16/22,736.40 = 9,404.40/x
3. Step 3: Cross multiply
   16,478.16x = 22,736.40 × 9,404.40
4. Step 4: Simplify right side
   16,478.16x = 213,822,200.16
5. Step 5: Solve for x
   x = 213,822,200.16/16,478.16
6. Step 6: Final answer
   x = 12,976.10