Finding the Third Proportional to 250,216 and 388,020

Step by Step Solution

1. Step 1: Write the proportion equation
   250,216 : 388,020 = 388,020 : x
2. Step 2: Convert to fraction form
   250,216/388,020 = 388,020/x
3. Step 3: Cross multiply
   250,216x = 388,020 × 388,020
4. Step 4: Simplify right side
   250,216x = 150,559,520,400
5. Step 5: Solve for x
   x = 150,559,520,400/250,216
6. Step 6: Final answer
   x = 601,718.20