Finding the Fourth Proportional to 2,315.49, 3,472.41 and 671.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,315.49 : 3,472.41 = 671.61 : x
2. Step 2: Convert to fraction form
   2,315.49/3,472.41 = 671.61/x
3. Step 3: Cross multiply
   2,315.49x = 3,472.41 × 671.61
4. Step 4: Simplify right side
   2,315.49x = 2,332,105.28
5. Step 5: Solve for x
   x = 2,332,105.28/2,315.49
6. Step 6: Final answer
   x = 1,007.18