Finding the Third Proportional to 557,274 and 1,221,384

Step by Step Solution

1. Step 1: Write the proportion equation
   557,274 : 1,221,384 = 1,221,384 : x
2. Step 2: Convert to fraction form
   557,274/1,221,384 = 1,221,384/x
3. Step 3: Cross multiply
   557,274x = 1,221,384 × 1,221,384
4. Step 4: Simplify right side
   557,274x = 1,491,778,875,456
5. Step 5: Solve for x
   x = 1,491,778,875,456/557,274
6. Step 6: Final answer
   x = 2,676,921.72