Finding the Fourth Proportional to 2,315.43, 3,473.31 and 672.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,315.43 : 3,473.31 = 672.11 : x
2. Step 2: Convert to fraction form
   2,315.43/3,473.31 = 672.11/x
3. Step 3: Cross multiply
   2,315.43x = 3,473.31 × 672.11
4. Step 4: Simplify right side
   2,315.43x = 2,334,429.02
5. Step 5: Solve for x
   x = 2,334,429.02/2,315.43
6. Step 6: Final answer
   x = 1,008.21