Finding the Third Proportional to 557,336 and 1,221,472

Step by Step Solution

1. Step 1: Write the proportion equation
   557,336 : 1,221,472 = 1,221,472 : x
2. Step 2: Convert to fraction form
   557,336/1,221,472 = 1,221,472/x
3. Step 3: Cross multiply
   557,336x = 1,221,472 × 1,221,472
4. Step 4: Simplify right side
   557,336x = 1,491,993,846,784
5. Step 5: Solve for x
   x = 1,491,993,846,784/557,336
6. Step 6: Final answer
   x = 2,677,009.64