Finding the Third Proportional to 239,979 and 342,949.50

Step by Step Solution

1. Step 1: Write the proportion equation
   239,979 : 342,949.50 = 342,949.50 : x
2. Step 2: Convert to fraction form
   239,979/342,949.50 = 342,949.50/x
3. Step 3: Cross multiply
   239,979x = 342,949.50 × 342,949.50
4. Step 4: Simplify right side
   239,979x = 117,614,359,550.25
5. Step 5: Solve for x
   x = 117,614,359,550.25/239,979
6. Step 6: Final answer
   x = 490,102.72