Finding the Third Proportional to 989,728 and 2,206,902

Step by Step Solution

1. Step 1: Write the proportion equation
   989,728 : 2,206,902 = 2,206,902 : x
2. Step 2: Convert to fraction form
   989,728/2,206,902 = 2,206,902/x
3. Step 3: Cross multiply
   989,728x = 2,206,902 × 2,206,902
4. Step 4: Simplify right side
   989,728x = 4,870,416,437,604
5. Step 5: Solve for x
   x = 4,870,416,437,604/989,728
6. Step 6: Final answer
   x = 4,920,964.59