Finding the Third Proportional to 239,811 and 351,940.50

Step by Step Solution

1. Step 1: Write the proportion equation
   239,811 : 351,940.50 = 351,940.50 : x
2. Step 2: Convert to fraction form
   239,811/351,940.50 = 351,940.50/x
3. Step 3: Cross multiply
   239,811x = 351,940.50 × 351,940.50
4. Step 4: Simplify right side
   239,811x = 123,862,115,540.25
5. Step 5: Solve for x
   x = 123,862,115,540.25/239,811
6. Step 6: Final answer
   x = 516,498.89