Finding the Third Proportional to 663,648 and 1,020,636

Step by Step Solution

1. Step 1: Write the proportion equation
   663,648 : 1,020,636 = 1,020,636 : x
2. Step 2: Convert to fraction form
   663,648/1,020,636 = 1,020,636/x
3. Step 3: Cross multiply
   663,648x = 1,020,636 × 1,020,636
4. Step 4: Simplify right side
   663,648x = 1,041,697,844,496
5. Step 5: Solve for x
   x = 1,041,697,844,496/663,648
6. Step 6: Final answer
   x = 1,569,654.16