Finding the Third Proportional to 404.06 and 609.56

Step by Step Solution

1. Step 1: Write the proportion equation
   404.06 : 609.56 = 609.56 : x
2. Step 2: Convert to fraction form
   404.06/609.56 = 609.56/x
3. Step 3: Cross multiply
   404.06x = 609.56 × 609.56
4. Step 4: Simplify right side
   404.06x = 371,566.44
5. Step 5: Solve for x
   x = 371,566.44/404.06
6. Step 6: Final answer
   x = 919.58