Finding the Fourth Proportional to 2,403.58, 3,605.78 and 1,105.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,403.58 : 3,605.78 = 1,105.18 : x
2. Step 2: Convert to fraction form
   2,403.58/3,605.78 = 1,105.18/x
3. Step 3: Cross multiply
   2,403.58x = 3,605.78 × 1,105.18
4. Step 4: Simplify right side
   2,403.58x = 3,985,035.94
5. Step 5: Solve for x
   x = 3,985,035.94/2,403.58
6. Step 6: Final answer
   x = 1,657.96