Finding the Fourth Proportional to 10,434.36, 14,399.28 and 5,718.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,434.36 : 14,399.28 = 5,718.60 : x
2. Step 2: Convert to fraction form
   10,434.36/14,399.28 = 5,718.60/x
3. Step 3: Cross multiply
   10,434.36x = 14,399.28 × 5,718.60
4. Step 4: Simplify right side
   10,434.36x = 82,343,722.61
5. Step 5: Solve for x
   x = 82,343,722.61/10,434.36
6. Step 6: Final answer
   x = 7,891.59