Finding the Third Proportional to 644,818 and 996,870

Step by Step Solution

1. Step 1: Write the proportion equation
   644,818 : 996,870 = 996,870 : x
2. Step 2: Convert to fraction form
   644,818/996,870 = 996,870/x
3. Step 3: Cross multiply
   644,818x = 996,870 × 996,870
4. Step 4: Simplify right side
   644,818x = 993,749,796,900
5. Step 5: Solve for x
   x = 993,749,796,900/644,818
6. Step 6: Final answer
   x = 1,541,132.22