Finding the Fourth Proportional to 1,092.89, 1,638.12 and 443.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,092.89 : 1,638.12 = 443.27 : x
2. Step 2: Convert to fraction form
   1,092.89/1,638.12 = 443.27/x
3. Step 3: Cross multiply
   1,092.89x = 1,638.12 × 443.27
4. Step 4: Simplify right side
   1,092.89x = 726,135.21
5. Step 5: Solve for x
   x = 726,135.21/1,092.89
6. Step 6: Final answer
   x = 664.42