Finding the Fourth Proportional to 22,479.91, 31,022.79 and 12,408.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,479.91 : 31,022.79 = 12,408.50 : x
2. Step 2: Convert to fraction form
   22,479.91/31,022.79 = 12,408.50/x
3. Step 3: Cross multiply
   22,479.91x = 31,022.79 × 12,408.50
4. Step 4: Simplify right side
   22,479.91x = 384,946,289.72
5. Step 5: Solve for x
   x = 384,946,289.72/22,479.91
6. Step 6: Final answer
   x = 17,124.02