Finding the Fourth Proportional to 2,407.43, 3,609.77 and 945.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,407.43 : 3,609.77 = 945.78 : x
2. Step 2: Convert to fraction form
   2,407.43/3,609.77 = 945.78/x
3. Step 3: Cross multiply
   2,407.43x = 3,609.77 × 945.78
4. Step 4: Simplify right side
   2,407.43x = 3,414,048.27
5. Step 5: Solve for x
   x = 3,414,048.27/2,407.43
6. Step 6: Final answer
   x = 1,418.13