Finding the Fourth Proportional to 8,766.78, 12,099.69 and 5,181.59

Step by Step Solution

1. Step 1: Write the proportion equation
   8,766.78 : 12,099.69 = 5,181.59 : x
2. Step 2: Convert to fraction form
   8,766.78/12,099.69 = 5,181.59/x
3. Step 3: Cross multiply
   8,766.78x = 12,099.69 × 5,181.59
4. Step 4: Simplify right side
   8,766.78x = 62,695,572.21
5. Step 5: Solve for x
   x = 62,695,572.21/8,766.78
6. Step 6: Final answer
   x = 7,151.49