Finding the Third Proportional to 355,638 and 839,496

Step by Step Solution

1. Step 1: Write the proportion equation
   355,638 : 839,496 = 839,496 : x
2. Step 2: Convert to fraction form
   355,638/839,496 = 839,496/x
3. Step 3: Cross multiply
   355,638x = 839,496 × 839,496
4. Step 4: Simplify right side
   355,638x = 704,753,534,016
5. Step 5: Solve for x
   x = 704,753,534,016/355,638
6. Step 6: Final answer
   x = 1,981,659.82