Finding the Third Proportional to 144,890.50 and 221,638.25

Step by Step Solution

1. Step 1: Write the proportion equation
   144,890.50 : 221,638.25 = 221,638.25 : x
2. Step 2: Convert to fraction form
   144,890.50/221,638.25 = 221,638.25/x
3. Step 3: Cross multiply
   144,890.50x = 221,638.25 × 221,638.25
4. Step 4: Simplify right side
   144,890.50x = 49,123,513,863.06
5. Step 5: Solve for x
   x = 49,123,513,863.06/144,890.50
6. Step 6: Final answer
   x = 339,038.89