Finding the Fourth Proportional to 8,522.88, 12,786.37 and 2,679.49

Step by Step Solution

1. Step 1: Write the proportion equation
   8,522.88 : 12,786.37 = 2,679.49 : x
2. Step 2: Convert to fraction form
   8,522.88/12,786.37 = 2,679.49/x
3. Step 3: Cross multiply
   8,522.88x = 12,786.37 × 2,679.49
4. Step 4: Simplify right side
   8,522.88x = 34,260,981.58
5. Step 5: Solve for x
   x = 34,260,981.58/8,522.88
6. Step 6: Final answer
   x = 4,019.88