Finding the Fourth Proportional to 1,089.72, 1,634.52 and 673.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,089.72 : 1,634.52 = 673.33 : x
2. Step 2: Convert to fraction form
   1,089.72/1,634.52 = 673.33/x
3. Step 3: Cross multiply
   1,089.72x = 1,634.52 × 673.33
4. Step 4: Simplify right side
   1,089.72x = 1,100,571.35
5. Step 5: Solve for x
   x = 1,100,571.35/1,089.72
6. Step 6: Final answer
   x = 1,009.96