Finding the Fourth Proportional to 8,456.16, 12,684.20 and 3,258.38

Step by Step Solution

1. Step 1: Write the proportion equation
   8,456.16 : 12,684.20 = 3,258.38 : x
2. Step 2: Convert to fraction form
   8,456.16/12,684.20 = 3,258.38/x
3. Step 3: Cross multiply
   8,456.16x = 12,684.20 × 3,258.38
4. Step 4: Simplify right side
   8,456.16x = 41,329,943.60
5. Step 5: Solve for x
   x = 41,329,943.60/8,456.16
6. Step 6: Final answer
   x = 4,887.55