Finding the Fourth Proportional to 2,628.78, 3,944.92 and 1,397.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,628.78 : 3,944.92 = 1,397.10 : x
2. Step 2: Convert to fraction form
   2,628.78/3,944.92 = 1,397.10/x
3. Step 3: Cross multiply
   2,628.78x = 3,944.92 × 1,397.10
4. Step 4: Simplify right side
   2,628.78x = 5,511,447.73
5. Step 5: Solve for x
   x = 5,511,447.73/2,628.78
6. Step 6: Final answer
   x = 2,096.58