Finding the Fourth Proportional to 2,403.88, 3,606.26 and 1,105.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,403.88 : 3,606.26 = 1,105.31 : x
2. Step 2: Convert to fraction form
   2,403.88/3,606.26 = 1,105.31/x
3. Step 3: Cross multiply
   2,403.88x = 3,606.26 × 1,105.31
4. Step 4: Simplify right side
   2,403.88x = 3,986,038.73
5. Step 5: Solve for x
   x = 3,986,038.73/2,403.88
6. Step 6: Final answer
   x = 1,658.17