Finding the Fourth Proportional to 1,443.92, 2,166.20 and 674

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.92 : 2,166.20 = 674 : x
2. Step 2: Convert to fraction form
   1,443.92/2,166.20 = 674/x
3. Step 3: Cross multiply
   1,443.92x = 2,166.20 × 674
4. Step 4: Simplify right side
   1,443.92x = 1,460,018.80
5. Step 5: Solve for x
   x = 1,460,018.80/1,443.92
6. Step 6: Final answer
   x = 1,011.15