Finding the Third Proportional to 268,771.50 and 388,521

Step by Step Solution

1. Step 1: Write the proportion equation
   268,771.50 : 388,521 = 388,521 : x
2. Step 2: Convert to fraction form
   268,771.50/388,521 = 388,521/x
3. Step 3: Cross multiply
   268,771.50x = 388,521 × 388,521
4. Step 4: Simplify right side
   268,771.50x = 150,948,567,441
5. Step 5: Solve for x
   x = 150,948,567,441/268,771.50
6. Step 6: Final answer
   x = 561,624.16