Finding the Third Proportional to 864,482 and 1,388,990

Step by Step Solution

1. Step 1: Write the proportion equation
   864,482 : 1,388,990 = 1,388,990 : x
2. Step 2: Convert to fraction form
   864,482/1,388,990 = 1,388,990/x
3. Step 3: Cross multiply
   864,482x = 1,388,990 × 1,388,990
4. Step 4: Simplify right side
   864,482x = 1,929,293,220,100
5. Step 5: Solve for x
   x = 1,929,293,220,100/864,482
6. Step 6: Final answer
   x = 2,231,733.25