Finding the Third Proportional to 250,315.50 and 388,311

Step by Step Solution

1. Step 1: Write the proportion equation
   250,315.50 : 388,311 = 388,311 : x
2. Step 2: Convert to fraction form
   250,315.50/388,311 = 388,311/x
3. Step 3: Cross multiply
   250,315.50x = 388,311 × 388,311
4. Step 4: Simplify right side
   250,315.50x = 150,785,432,721
5. Step 5: Solve for x
   x = 150,785,432,721/250,315.50
6. Step 6: Final answer
   x = 602,381.53