Finding the Fourth Proportional to 8,766.53, 12,091.11 and 5,580.33

Step by Step Solution

1. Step 1: Write the proportion equation
   8,766.53 : 12,091.11 = 5,580.33 : x
2. Step 2: Convert to fraction form
   8,766.53/12,091.11 = 5,580.33/x
3. Step 3: Cross multiply
   8,766.53x = 12,091.11 × 5,580.33
4. Step 4: Simplify right side
   8,766.53x = 67,472,317.60
5. Step 5: Solve for x
   x = 67,472,317.60/8,766.53
6. Step 6: Final answer
   x = 7,696.58