Finding the Fourth Proportional to 2,648.43, 3,972.60 and 674.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.43 : 3,972.60 = 674.07 : x
2. Step 2: Convert to fraction form
   2,648.43/3,972.60 = 674.07/x
3. Step 3: Cross multiply
   2,648.43x = 3,972.60 × 674.07
4. Step 4: Simplify right side
   2,648.43x = 2,677,810.48
5. Step 5: Solve for x
   x = 2,677,810.48/2,648.43
6. Step 6: Final answer
   x = 1,011.09