Finding the Third Proportional to 1,203,678 and 1,869,789

Step by Step Solution

1. Step 1: Write the proportion equation
   1,203,678 : 1,869,789 = 1,869,789 : x
2. Step 2: Convert to fraction form
   1,203,678/1,869,789 = 1,869,789/x
3. Step 3: Cross multiply
   1,203,678x = 1,869,789 × 1,869,789
4. Step 4: Simplify right side
   1,203,678x = 3,496,110,904,521
5. Step 5: Solve for x
   x = 3,496,110,904,521/1,203,678
6. Step 6: Final answer
   x = 2,904,523.39