Finding the Third Proportional to 250,510 and 388,496

Step by Step Solution

1. Step 1: Write the proportion equation
   250,510 : 388,496 = 388,496 : x
2. Step 2: Convert to fraction form
   250,510/388,496 = 388,496/x
3. Step 3: Cross multiply
   250,510x = 388,496 × 388,496
4. Step 4: Simplify right side
   250,510x = 150,929,142,016
5. Step 5: Solve for x
   x = 150,929,142,016/250,510
6. Step 6: Final answer
   x = 602,487.49