Finding the Third Proportional to 250,680 and 388,345

Step by Step Solution

1. Step 1: Write the proportion equation
   250,680 : 388,345 = 388,345 : x
2. Step 2: Convert to fraction form
   250,680/388,345 = 388,345/x
3. Step 3: Cross multiply
   250,680x = 388,345 × 388,345
4. Step 4: Simplify right side
   250,680x = 150,811,839,025
5. Step 5: Solve for x
   x = 150,811,839,025/250,680
6. Step 6: Final answer
   x = 601,610.97