Finding the Third Proportional to 250,718 and 388,386

Step by Step Solution

1. Step 1: Write the proportion equation
   250,718 : 388,386 = 388,386 : x
2. Step 2: Convert to fraction form
   250,718/388,386 = 388,386/x
3. Step 3: Cross multiply
   250,718x = 388,386 × 388,386
4. Step 4: Simplify right side
   250,718x = 150,843,684,996
5. Step 5: Solve for x
   x = 150,843,684,996/250,718
6. Step 6: Final answer
   x = 601,646.81