Finding the Fourth Proportional to 16,479.40, 22,738.16 and 9,408.12

Step by Step Solution

1. Step 1: Write the proportion equation
   16,479.40 : 22,738.16 = 9,408.12 : x
2. Step 2: Convert to fraction form
   16,479.40/22,738.16 = 9,408.12/x
3. Step 3: Cross multiply
   16,479.40x = 22,738.16 × 9,408.12
4. Step 4: Simplify right side
   16,479.40x = 213,923,337.86
5. Step 5: Solve for x
   x = 213,923,337.86/16,479.40
6. Step 6: Final answer
   x = 12,981.26