Finding the Third Proportional to 1,286,638 and 1,892,521

Step by Step Solution

1. Step 1: Write the proportion equation
   1,286,638 : 1,892,521 = 1,892,521 : x
2. Step 2: Convert to fraction form
   1,286,638/1,892,521 = 1,892,521/x
3. Step 3: Cross multiply
   1,286,638x = 1,892,521 × 1,892,521
4. Step 4: Simplify right side
   1,286,638x = 3,581,635,735,441
5. Step 5: Solve for x
   x = 3,581,635,735,441/1,286,638
6. Step 6: Final answer
   x = 2,783,716.74