Finding the Fourth Proportional to 8,196.78, 12,296.77 and 2,648.64

Step by Step Solution

1. Step 1: Write the proportion equation
   8,196.78 : 12,296.77 = 2,648.64 : x
2. Step 2: Convert to fraction form
   8,196.78/12,296.77 = 2,648.64/x
3. Step 3: Cross multiply
   8,196.78x = 12,296.77 × 2,648.64
4. Step 4: Simplify right side
   8,196.78x = 32,569,716.89
5. Step 5: Solve for x
   x = 32,569,716.89/8,196.78
6. Step 6: Final answer
   x = 3,973.48