Finding the Fourth Proportional to 8,766.06, 12,091.86 and 5,616.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,766.06 : 12,091.86 = 5,616.78 : x
2. Step 2: Convert to fraction form
   8,766.06/12,091.86 = 5,616.78/x
3. Step 3: Cross multiply
   8,766.06x = 12,091.86 × 5,616.78
4. Step 4: Simplify right side
   8,766.06x = 67,917,317.41
5. Step 5: Solve for x
   x = 67,917,317.41/8,766.06
6. Step 6: Final answer
   x = 7,747.76