Finding the Fourth Proportional to 10,868.88, 16,305.72 and 3,943.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,868.88 : 16,305.72 = 3,943.20 : x
2. Step 2: Convert to fraction form
   10,868.88/16,305.72 = 3,943.20/x
3. Step 3: Cross multiply
   10,868.88x = 16,305.72 × 3,943.20
4. Step 4: Simplify right side
   10,868.88x = 64,296,715.10
5. Step 5: Solve for x
   x = 64,296,715.10/10,868.88
6. Step 6: Final answer
   x = 5,915.67