Finding the Third Proportional to 404.56 and 866.75

Step by Step Solution

1. Step 1: Write the proportion equation
   404.56 : 866.75 = 866.75 : x
2. Step 2: Convert to fraction form
   404.56/866.75 = 866.75/x
3. Step 3: Cross multiply
   404.56x = 866.75 × 866.75
4. Step 4: Simplify right side
   404.56x = 751,255.56
5. Step 5: Solve for x
   x = 751,255.56/404.56
6. Step 6: Final answer
   x = 1,856.96