Finding the Fourth Proportional to 10,434.21, 14,399.21 and 5,718.49

Step by Step Solution

1. Step 1: Write the proportion equation
   10,434.21 : 14,399.21 = 5,718.49 : x
2. Step 2: Convert to fraction form
   10,434.21/14,399.21 = 5,718.49/x
3. Step 3: Cross multiply
   10,434.21x = 14,399.21 × 5,718.49
4. Step 4: Simplify right side
   10,434.21x = 82,341,738.39
5. Step 5: Solve for x
   x = 82,341,738.39/10,434.21
6. Step 6: Final answer
   x = 7,891.52