Finding the Fourth Proportional to 2,648.82, 3,971.88 and 1,331.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.82 : 3,971.88 = 1,331.16 : x
2. Step 2: Convert to fraction form
   2,648.82/3,971.88 = 1,331.16/x
3. Step 3: Cross multiply
   2,648.82x = 3,971.88 × 1,331.16
4. Step 4: Simplify right side
   2,648.82x = 5,287,207.78
5. Step 5: Solve for x
   x = 5,287,207.78/2,648.82
6. Step 6: Final answer
   x = 1,996.06