Finding the Third Proportional to 864,466 and 1,388,963

Step by Step Solution

1. Step 1: Write the proportion equation
   864,466 : 1,388,963 = 1,388,963 : x
2. Step 2: Convert to fraction form
   864,466/1,388,963 = 1,388,963/x
3. Step 3: Cross multiply
   864,466x = 1,388,963 × 1,388,963
4. Step 4: Simplify right side
   864,466x = 1,929,218,215,369
5. Step 5: Solve for x
   x = 1,929,218,215,369/864,466
6. Step 6: Final answer
   x = 2,231,687.79