Finding the Fourth Proportional to 8,520.24, 12,780.52 and 3,326.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,520.24 : 12,780.52 = 3,326.28 : x
2. Step 2: Convert to fraction form
   8,520.24/12,780.52 = 3,326.28/x
3. Step 3: Cross multiply
   8,520.24x = 12,780.52 × 3,326.28
4. Step 4: Simplify right side
   8,520.24x = 42,511,588.07
5. Step 5: Solve for x
   x = 42,511,588.07/8,520.24
6. Step 6: Final answer
   x = 4,989.48