Finding the Fourth Proportional to 8,517.56, 12,768.78 and 3,327.08

Step by Step Solution

1. Step 1: Write the proportion equation
   8,517.56 : 12,768.78 = 3,327.08 : x
2. Step 2: Convert to fraction form
   8,517.56/12,768.78 = 3,327.08/x
3. Step 3: Cross multiply
   8,517.56x = 12,768.78 × 3,327.08
4. Step 4: Simplify right side
   8,517.56x = 42,482,752.56
5. Step 5: Solve for x
   x = 42,482,752.56/8,517.56
6. Step 6: Final answer
   x = 4,987.67