Finding the Third Proportional to 144,976.50 and 221,791.50

Step by Step Solution

1. Step 1: Write the proportion equation
   144,976.50 : 221,791.50 = 221,791.50 : x
2. Step 2: Convert to fraction form
   144,976.50/221,791.50 = 221,791.50/x
3. Step 3: Cross multiply
   144,976.50x = 221,791.50 × 221,791.50
4. Step 4: Simplify right side
   144,976.50x = 49,191,469,472.25
5. Step 5: Solve for x
   x = 49,191,469,472.25/144,976.50
6. Step 6: Final answer
   x = 339,306.50