Finding the Third Proportional to 404,872 and 868,658

Step by Step Solution

1. Step 1: Write the proportion equation
   404,872 : 868,658 = 868,658 : x
2. Step 2: Convert to fraction form
   404,872/868,658 = 868,658/x
3. Step 3: Cross multiply
   404,872x = 868,658 × 868,658
4. Step 4: Simplify right side
   404,872x = 754,566,720,964
5. Step 5: Solve for x
   x = 754,566,720,964/404,872
6. Step 6: Final answer
   x = 1,863,716.73