Finding the Third Proportional to 404.19 and 861.38

Step by Step Solution

1. Step 1: Write the proportion equation
   404.19 : 861.38 = 861.38 : x
2. Step 2: Convert to fraction form
   404.19/861.38 = 861.38/x
3. Step 3: Cross multiply
   404.19x = 861.38 × 861.38
4. Step 4: Simplify right side
   404.19x = 741,966.89
5. Step 5: Solve for x
   x = 741,966.89/404.19
6. Step 6: Final answer
   x = 1,835.70