Finding the Third Proportional to 864,456 and 1,388,948

Step by Step Solution

1. Step 1: Write the proportion equation
   864,456 : 1,388,948 = 1,388,948 : x
2. Step 2: Convert to fraction form
   864,456/1,388,948 = 1,388,948/x
3. Step 3: Cross multiply
   864,456x = 1,388,948 × 1,388,948
4. Step 4: Simplify right side
   864,456x = 1,929,176,546,704
5. Step 5: Solve for x
   x = 1,929,176,546,704/864,456
6. Step 6: Final answer
   x = 2,231,665.40