Finding the Third Proportional to 400,443 and 870,582

Step by Step Solution

1. Step 1: Write the proportion equation
   400,443 : 870,582 = 870,582 : x
2. Step 2: Convert to fraction form
   400,443/870,582 = 870,582/x
3. Step 3: Cross multiply
   400,443x = 870,582 × 870,582
4. Step 4: Simplify right side
   400,443x = 757,913,018,724
5. Step 5: Solve for x
   x = 757,913,018,724/400,443
6. Step 6: Final answer
   x = 1,892,686.40