Finding the Third Proportional to 239,386.50 and 518,670

Step by Step Solution

1. Step 1: Write the proportion equation
   239,386.50 : 518,670 = 518,670 : x
2. Step 2: Convert to fraction form
   239,386.50/518,670 = 518,670/x
3. Step 3: Cross multiply
   239,386.50x = 518,670 × 518,670
4. Step 4: Simplify right side
   239,386.50x = 269,018,568,900
5. Step 5: Solve for x
   x = 269,018,568,900/239,386.50
6. Step 6: Final answer
   x = 1,123,783.38