Finding the Fourth Proportional to 2,105.80, 3,158.81 and 935.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.80 : 3,158.81 = 935.53 : x
2. Step 2: Convert to fraction form
   2,105.80/3,158.81 = 935.53/x
3. Step 3: Cross multiply
   2,105.80x = 3,158.81 × 935.53
4. Step 4: Simplify right side
   2,105.80x = 2,955,161.52
5. Step 5: Solve for x
   x = 2,955,161.52/2,105.80
6. Step 6: Final answer
   x = 1,403.34