Finding the Fourth Proportional to 8,196.39, 12,291.96 and 2,648.55

Step by Step Solution

1. Step 1: Write the proportion equation
   8,196.39 : 12,291.96 = 2,648.55 : x
2. Step 2: Convert to fraction form
   8,196.39/12,291.96 = 2,648.55/x
3. Step 3: Cross multiply
   8,196.39x = 12,291.96 × 2,648.55
4. Step 4: Simplify right side
   8,196.39x = 32,555,870.66
5. Step 5: Solve for x
   x = 32,555,870.66/8,196.39
6. Step 6: Final answer
   x = 3,971.98