Finding the Third Proportional to 401,768 and 891,648

Step by Step Solution

1. Step 1: Write the proportion equation
   401,768 : 891,648 = 891,648 : x
2. Step 2: Convert to fraction form
   401,768/891,648 = 891,648/x
3. Step 3: Cross multiply
   401,768x = 891,648 × 891,648
4. Step 4: Simplify right side
   401,768x = 795,036,155,904
5. Step 5: Solve for x
   x = 795,036,155,904/401,768
6. Step 6: Final answer
   x = 1,978,843.90