Finding the Third Proportional to 250,286 and 518,315.50

Step by Step Solution

1. Step 1: Write the proportion equation
   250,286 : 518,315.50 = 518,315.50 : x
2. Step 2: Convert to fraction form
   250,286/518,315.50 = 518,315.50/x
3. Step 3: Cross multiply
   250,286x = 518,315.50 × 518,315.50
4. Step 4: Simplify right side
   250,286x = 268,650,957,540.25
5. Step 5: Solve for x
   x = 268,650,957,540.25/250,286
6. Step 6: Final answer
   x = 1,073,375.89