Finding the Fourth Proportional to 8,550.78, 12,826.03 and 7,086.84

Step by Step Solution

1. Step 1: Write the proportion equation
   8,550.78 : 12,826.03 = 7,086.84 : x
2. Step 2: Convert to fraction form
   8,550.78/12,826.03 = 7,086.84/x
3. Step 3: Cross multiply
   8,550.78x = 12,826.03 × 7,086.84
4. Step 4: Simplify right side
   8,550.78x = 90,896,022.45
5. Step 5: Solve for x
   x = 90,896,022.45/8,550.78
6. Step 6: Final answer
   x = 10,630.14