Finding the Fourth Proportional to 8,479.89, 12,721.59 and 2,636.82

Step by Step Solution

1. Step 1: Write the proportion equation
   8,479.89 : 12,721.59 = 2,636.82 : x
2. Step 2: Convert to fraction form
   8,479.89/12,721.59 = 2,636.82/x
3. Step 3: Cross multiply
   8,479.89x = 12,721.59 × 2,636.82
4. Step 4: Simplify right side
   8,479.89x = 33,544,542.94
5. Step 5: Solve for x
   x = 33,544,542.94/8,479.89
6. Step 6: Final answer
   x = 3,955.78