Finding the Third Proportional to 663,686 and 1,020,711

Step by Step Solution

1. Step 1: Write the proportion equation
   663,686 : 1,020,711 = 1,020,711 : x
2. Step 2: Convert to fraction form
   663,686/1,020,711 = 1,020,711/x
3. Step 3: Cross multiply
   663,686x = 1,020,711 × 1,020,711
4. Step 4: Simplify right side
   663,686x = 1,041,850,945,521
5. Step 5: Solve for x
   x = 1,041,850,945,521/663,686
6. Step 6: Final answer
   x = 1,569,794.97