Finding the Third Proportional to 250,330 and 388,140

Step by Step Solution

1. Step 1: Write the proportion equation
   250,330 : 388,140 = 388,140 : x
2. Step 2: Convert to fraction form
   250,330/388,140 = 388,140/x
3. Step 3: Cross multiply
   250,330x = 388,140 × 388,140
4. Step 4: Simplify right side
   250,330x = 150,652,659,600
5. Step 5: Solve for x
   x = 150,652,659,600/250,330
6. Step 6: Final answer
   x = 601,816.24