Finding the Fourth Proportional to 2,648.86, 3,974.42 and 1,331.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.86 : 3,974.42 = 1,331.92 : x
2. Step 2: Convert to fraction form
   2,648.86/3,974.42 = 1,331.92/x
3. Step 3: Cross multiply
   2,648.86x = 3,974.42 × 1,331.92
4. Step 4: Simplify right side
   2,648.86x = 5,293,592.89
5. Step 5: Solve for x
   x = 5,293,592.89/2,648.86
6. Step 6: Final answer
   x = 1,998.44