Finding the Fourth Proportional to 8,505.48, 12,756.17 and 3,240.27

Step by Step Solution

1. Step 1: Write the proportion equation
   8,505.48 : 12,756.17 = 3,240.27 : x
2. Step 2: Convert to fraction form
   8,505.48/12,756.17 = 3,240.27/x
3. Step 3: Cross multiply
   8,505.48x = 12,756.17 × 3,240.27
4. Step 4: Simplify right side
   8,505.48x = 41,333,418.76
5. Step 5: Solve for x
   x = 41,333,418.76/8,505.48
6. Step 6: Final answer
   x = 4,859.62