Finding the Fourth Proportional to 10,431.80, 14,395.89 and 5,716.08

Step by Step Solution

1. Step 1: Write the proportion equation
   10,431.80 : 14,395.89 = 5,716.08 : x
2. Step 2: Convert to fraction form
   10,431.80/14,395.89 = 5,716.08/x
3. Step 3: Cross multiply
   10,431.80x = 14,395.89 × 5,716.08
4. Step 4: Simplify right side
   10,431.80x = 82,288,058.91
5. Step 5: Solve for x
   x = 82,288,058.91/10,431.80
6. Step 6: Final answer
   x = 7,888.19