Finding the Fourth Proportional to 2,405.78, 3,608.70 and 674.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,405.78 : 3,608.70 = 674.42 : x
2. Step 2: Convert to fraction form
   2,405.78/3,608.70 = 674.42/x
3. Step 3: Cross multiply
   2,405.78x = 3,608.70 × 674.42
4. Step 4: Simplify right side
   2,405.78x = 2,433,779.45
5. Step 5: Solve for x
   x = 2,433,779.45/2,405.78
6. Step 6: Final answer
   x = 1,011.64