Finding the Fourth Proportional to 8,641.09, 12,968.56 and 3,963.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,641.09 : 12,968.56 = 3,963.30 : x
2. Step 2: Convert to fraction form
   8,641.09/12,968.56 = 3,963.30/x
3. Step 3: Cross multiply
   8,641.09x = 12,968.56 × 3,963.30
4. Step 4: Simplify right side
   8,641.09x = 51,398,348.45
5. Step 5: Solve for x
   x = 51,398,348.45/8,641.09
6. Step 6: Final answer
   x = 5,948.13