Finding the Fourth Proportional to 2,405.49, 3,608.42 and 845.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,405.49 : 3,608.42 = 845.61 : x
2. Step 2: Convert to fraction form
   2,405.49/3,608.42 = 845.61/x
3. Step 3: Cross multiply
   2,405.49x = 3,608.42 × 845.61
4. Step 4: Simplify right side
   2,405.49x = 3,051,311.81
5. Step 5: Solve for x
   x = 3,051,311.81/2,405.49
6. Step 6: Final answer
   x = 1,268.48