Finding the Third Proportional to 636,856 and 1,022,638

Step by Step Solution

1. Step 1: Write the proportion equation
   636,856 : 1,022,638 = 1,022,638 : x
2. Step 2: Convert to fraction form
   636,856/1,022,638 = 1,022,638/x
3. Step 3: Cross multiply
   636,856x = 1,022,638 × 1,022,638
4. Step 4: Simplify right side
   636,856x = 1,045,788,479,044
5. Step 5: Solve for x
   x = 1,045,788,479,044/636,856
6. Step 6: Final answer
   x = 1,642,111.37