Finding the Fourth Proportional to 10,880.40, 16,310.72 and 3,950

Step by Step Solution

1. Step 1: Write the proportion equation
   10,880.40 : 16,310.72 = 3,950 : x
2. Step 2: Convert to fraction form
   10,880.40/16,310.72 = 3,950/x
3. Step 3: Cross multiply
   10,880.40x = 16,310.72 × 3,950
4. Step 4: Simplify right side
   10,880.40x = 64,427,344
5. Step 5: Solve for x
   x = 64,427,344/10,880.40
6. Step 6: Final answer
   x = 5,921.41