Finding the Third Proportional to 864,486 and 1,388,997

Step by Step Solution

1. Step 1: Write the proportion equation
   864,486 : 1,388,997 = 1,388,997 : x
2. Step 2: Convert to fraction form
   864,486/1,388,997 = 1,388,997/x
3. Step 3: Cross multiply
   864,486x = 1,388,997 × 1,388,997
4. Step 4: Simplify right side
   864,486x = 1,929,312,666,009
5. Step 5: Solve for x
   x = 1,929,312,666,009/864,486
6. Step 6: Final answer
   x = 2,231,745.41