Finding the Fourth Proportional to 8,768.15, 12,099.86 and 4,789.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,768.15 : 12,099.86 = 4,789.28 : x
2. Step 2: Convert to fraction form
   8,768.15/12,099.86 = 4,789.28/x
3. Step 3: Cross multiply
   8,768.15x = 12,099.86 × 4,789.28
4. Step 4: Simplify right side
   8,768.15x = 57,949,617.50
5. Step 5: Solve for x
   x = 57,949,617.50/8,768.15
6. Step 6: Final answer
   x = 6,609.10