Finding the Third Proportional to 155.50 and 404

Step by Step Solution

1. Step 1: Write the proportion equation
   155.50 : 404 = 404 : x
2. Step 2: Convert to fraction form
   155.50/404 = 404/x
3. Step 3: Cross multiply
   155.50x = 404 × 404
4. Step 4: Simplify right side
   155.50x = 163,216
5. Step 5: Solve for x
   x = 163,216/155.50
6. Step 6: Final answer
   x = 1,049.62