Finding the Fourth Proportional to 8,388.56, 12,578.16 and 5,759.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,388.56 : 12,578.16 = 5,759.12 : x
2. Step 2: Convert to fraction form
   8,388.56/12,578.16 = 5,759.12/x
3. Step 3: Cross multiply
   8,388.56x = 12,578.16 × 5,759.12
4. Step 4: Simplify right side
   8,388.56x = 72,439,132.82
5. Step 5: Solve for x
   x = 72,439,132.82/8,388.56
6. Step 6: Final answer
   x = 8,635.47