Finding the Fourth Proportional to 9,960.78, 14,934.24 and 4,411.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,960.78 : 14,934.24 = 4,411.09 : x
2. Step 2: Convert to fraction form
   9,960.78/14,934.24 = 4,411.09/x
3. Step 3: Cross multiply
   9,960.78x = 14,934.24 × 4,411.09
4. Step 4: Simplify right side
   9,960.78x = 65,876,276.72
5. Step 5: Solve for x
   x = 65,876,276.72/9,960.78
6. Step 6: Final answer
   x = 6,613.57