Finding the Fourth Proportional to 2,405.57, 3,609.98 and 845.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,405.57 : 3,609.98 = 845.58 : x
2. Step 2: Convert to fraction form
   2,405.57/3,609.98 = 845.58/x
3. Step 3: Cross multiply
   2,405.57x = 3,609.98 × 845.58
4. Step 4: Simplify right side
   2,405.57x = 3,052,522.66
5. Step 5: Solve for x
   x = 3,052,522.66/2,405.57
6. Step 6: Final answer
   x = 1,268.94