Finding the Fourth Proportional to 8,863.86, 12,229.90 and 5,716.26

Step by Step Solution

1. Step 1: Write the proportion equation
   8,863.86 : 12,229.90 = 5,716.26 : x
2. Step 2: Convert to fraction form
   8,863.86/12,229.90 = 5,716.26/x
3. Step 3: Cross multiply
   8,863.86x = 12,229.90 × 5,716.26
4. Step 4: Simplify right side
   8,863.86x = 69,909,288.17
5. Step 5: Solve for x
   x = 69,909,288.17/8,863.86
6. Step 6: Final answer
   x = 7,887.00