Finding the Fourth Proportional to 2,105.10, 3,153.51 and 1,281.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.10 : 3,153.51 = 1,281.33 : x
2. Step 2: Convert to fraction form
   2,105.10/3,153.51 = 1,281.33/x
3. Step 3: Cross multiply
   2,105.10x = 3,153.51 × 1,281.33
4. Step 4: Simplify right side
   2,105.10x = 4,040,686.97
5. Step 5: Solve for x
   x = 4,040,686.97/2,105.10
6. Step 6: Final answer
   x = 1,919.48