Finding the Fourth Proportional to 1,136.67, 1,705.23 and 443.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,136.67 : 1,705.23 = 443.31 : x
2. Step 2: Convert to fraction form
   1,136.67/1,705.23 = 443.31/x
3. Step 3: Cross multiply
   1,136.67x = 1,705.23 × 443.31
4. Step 4: Simplify right side
   1,136.67x = 755,943.29
5. Step 5: Solve for x
   x = 755,943.29/1,136.67
6. Step 6: Final answer
   x = 665.05