Finding the Third Proportional to 864,552 and 1,389,087

Step by Step Solution

1. Step 1: Write the proportion equation
   864,552 : 1,389,087 = 1,389,087 : x
2. Step 2: Convert to fraction form
   864,552/1,389,087 = 1,389,087/x
3. Step 3: Cross multiply
   864,552x = 1,389,087 × 1,389,087
4. Step 4: Simplify right side
   864,552x = 1,929,562,693,569
5. Step 5: Solve for x
   x = 1,929,562,693,569/864,552
6. Step 6: Final answer
   x = 2,231,864.24