Finding the Third Proportional to 428,304 and 666,192

Step by Step Solution

1. Step 1: Write the proportion equation
   428,304 : 666,192 = 666,192 : x
2. Step 2: Convert to fraction form
   428,304/666,192 = 666,192/x
3. Step 3: Cross multiply
   428,304x = 666,192 × 666,192
4. Step 4: Simplify right side
   428,304x = 443,811,780,864
5. Step 5: Solve for x
   x = 443,811,780,864/428,304
6. Step 6: Final answer
   x = 1,036,207.42