Finding the Fourth Proportional to 2,403.90, 3,605.31 and 1,104.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,403.90 : 3,605.31 = 1,104.12 : x
2. Step 2: Convert to fraction form
   2,403.90/3,605.31 = 1,104.12/x
3. Step 3: Cross multiply
   2,403.90x = 3,605.31 × 1,104.12
4. Step 4: Simplify right side
   2,403.90x = 3,980,694.88
5. Step 5: Solve for x
   x = 3,980,694.88/2,403.90
6. Step 6: Final answer
   x = 1,655.93