Finding the Fourth Proportional to 10,399.40, 14,351.38 and 5,683.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,399.40 : 14,351.38 = 5,683.88 : x
2. Step 2: Convert to fraction form
   10,399.40/14,351.38 = 5,683.88/x
3. Step 3: Cross multiply
   10,399.40x = 14,351.38 × 5,683.88
4. Step 4: Simplify right side
   10,399.40x = 81,571,521.75
5. Step 5: Solve for x
   x = 81,571,521.75/10,399.40
6. Step 6: Final answer
   x = 7,843.87