Finding the Fourth Proportional to 2,405.40, 3,607.56 and 1,105.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,405.40 : 3,607.56 = 1,105.62 : x
2. Step 2: Convert to fraction form
   2,405.40/3,607.56 = 1,105.62/x
3. Step 3: Cross multiply
   2,405.40x = 3,607.56 × 1,105.62
4. Step 4: Simplify right side
   2,405.40x = 3,988,590.49
5. Step 5: Solve for x
   x = 3,988,590.49/2,405.40
6. Step 6: Final answer
   x = 1,658.18