Finding the Third Proportional to 404,658 and 868,356

Step by Step Solution

1. Step 1: Write the proportion equation
   404,658 : 868,356 = 868,356 : x
2. Step 2: Convert to fraction form
   404,658/868,356 = 868,356/x
3. Step 3: Cross multiply
   404,658x = 868,356 × 868,356
4. Step 4: Simplify right side
   404,658x = 754,042,142,736
5. Step 5: Solve for x
   x = 754,042,142,736/404,658
6. Step 6: Final answer
   x = 1,863,405.99