Finding the Fourth Proportional to 2,315.50, 3,472.43 and 671.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,315.50 : 3,472.43 = 671.72 : x
2. Step 2: Convert to fraction form
   2,315.50/3,472.43 = 671.72/x
3. Step 3: Cross multiply
   2,315.50x = 3,472.43 × 671.72
4. Step 4: Simplify right side
   2,315.50x = 2,332,479.96
5. Step 5: Solve for x
   x = 2,332,479.96/2,315.50
6. Step 6: Final answer
   x = 1,007.33