Finding the Fourth Proportional to 2,621.10, 3,931.90 and 673.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.10 : 3,931.90 = 673.32 : x
2. Step 2: Convert to fraction form
   2,621.10/3,931.90 = 673.32/x
3. Step 3: Cross multiply
   2,621.10x = 3,931.90 × 673.32
4. Step 4: Simplify right side
   2,621.10x = 2,647,426.91
5. Step 5: Solve for x
   x = 2,647,426.91/2,621.10
6. Step 6: Final answer
   x = 1,010.04