Finding the Third Proportional to 404.72 and 866.87

Step by Step Solution

1. Step 1: Write the proportion equation
   404.72 : 866.87 = 866.87 : x
2. Step 2: Convert to fraction form
   404.72/866.87 = 866.87/x
3. Step 3: Cross multiply
   404.72x = 866.87 × 866.87
4. Step 4: Simplify right side
   404.72x = 751,470.57
5. Step 5: Solve for x
   x = 751,470.57/404.72
6. Step 6: Final answer
   x = 1,856.75