Finding the Third Proportional to 120,678 and 244,590

Step by Step Solution

1. Step 1: Write the proportion equation
   120,678 : 244,590 = 244,590 : x
2. Step 2: Convert to fraction form
   120,678/244,590 = 244,590/x
3. Step 3: Cross multiply
   120,678x = 244,590 × 244,590
4. Step 4: Simplify right side
   120,678x = 59,824,268,100
5. Step 5: Solve for x
   x = 59,824,268,100/120,678
6. Step 6: Final answer
   x = 495,734.67