Finding the Third Proportional to 213,512 and 494,228

Step by Step Solution

1. Step 1: Write the proportion equation
   213,512 : 494,228 = 494,228 : x
2. Step 2: Convert to fraction form
   213,512/494,228 = 494,228/x
3. Step 3: Cross multiply
   213,512x = 494,228 × 494,228
4. Step 4: Simplify right side
   213,512x = 244,261,315,984
5. Step 5: Solve for x
   x = 244,261,315,984/213,512
6. Step 6: Final answer
   x = 1,144,016.80