Finding the Fourth Proportional to 2,315.28, 3,473.43 and 671.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,315.28 : 3,473.43 = 671.90 : x
2. Step 2: Convert to fraction form
   2,315.28/3,473.43 = 671.90/x
3. Step 3: Cross multiply
   2,315.28x = 3,473.43 × 671.90
4. Step 4: Simplify right side
   2,315.28x = 2,333,780.25
5. Step 5: Solve for x
   x = 2,333,780.25/2,315.28
6. Step 6: Final answer
   x = 1,007.99