Finding the Third Proportional to 557,556 and 1,221,816

Step by Step Solution

1. Step 1: Write the proportion equation
   557,556 : 1,221,816 = 1,221,816 : x
2. Step 2: Convert to fraction form
   557,556/1,221,816 = 1,221,816/x
3. Step 3: Cross multiply
   557,556x = 1,221,816 × 1,221,816
4. Step 4: Simplify right side
   557,556x = 1,492,834,337,856
5. Step 5: Solve for x
   x = 1,492,834,337,856/557,556
6. Step 6: Final answer
   x = 2,677,460.81