Finding the Third Proportional to 217,496 and 479,136

Step by Step Solution

1. Step 1: Write the proportion equation
   217,496 : 479,136 = 479,136 : x
2. Step 2: Convert to fraction form
   217,496/479,136 = 479,136/x
3. Step 3: Cross multiply
   217,496x = 479,136 × 479,136
4. Step 4: Simplify right side
   217,496x = 229,571,306,496
5. Step 5: Solve for x
   x = 229,571,306,496/217,496
6. Step 6: Final answer
   x = 1,055,519.67