Finding the Fourth Proportional to 8,641.38, 12,968.55 and 5,359.26

Step by Step Solution

1. Step 1: Write the proportion equation
   8,641.38 : 12,968.55 = 5,359.26 : x
2. Step 2: Convert to fraction form
   8,641.38/12,968.55 = 5,359.26/x
3. Step 3: Cross multiply
   8,641.38x = 12,968.55 × 5,359.26
4. Step 4: Simplify right side
   8,641.38x = 69,501,831.27
5. Step 5: Solve for x
   x = 69,501,831.27/8,641.38
6. Step 6: Final answer
   x = 8,042.91