Finding the Fourth Proportional to 1,660.89, 2,491.32 and 673.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,660.89 : 2,491.32 = 673.69 : x
2. Step 2: Convert to fraction form
   1,660.89/2,491.32 = 673.69/x
3. Step 3: Cross multiply
   1,660.89x = 2,491.32 × 673.69
4. Step 4: Simplify right side
   1,660.89x = 1,678,361.55
5. Step 5: Solve for x
   x = 1,678,361.55/1,660.89
6. Step 6: Final answer
   x = 1,010.52