Finding the Fourth Proportional to 14,648.72, 20,215.12 and 7,934.18

Step by Step Solution

1. Step 1: Write the proportion equation
   14,648.72 : 20,215.12 = 7,934.18 : x
2. Step 2: Convert to fraction form
   14,648.72/20,215.12 = 7,934.18/x
3. Step 3: Cross multiply
   14,648.72x = 20,215.12 × 7,934.18
4. Step 4: Simplify right side
   14,648.72x = 160,390,400.80
5. Step 5: Solve for x
   x = 160,390,400.80/14,648.72
6. Step 6: Final answer
   x = 10,949.11