Finding the Fourth Proportional to 10,431.72, 14,395.86 and 5,716.44

Step by Step Solution

1. Step 1: Write the proportion equation
   10,431.72 : 14,395.86 = 5,716.44 : x
2. Step 2: Convert to fraction form
   10,431.72/14,395.86 = 5,716.44/x
3. Step 3: Cross multiply
   10,431.72x = 14,395.86 × 5,716.44
4. Step 4: Simplify right side
   10,431.72x = 82,293,069.94
5. Step 5: Solve for x
   x = 82,293,069.94/10,431.72
6. Step 6: Final answer
   x = 7,888.73