Finding the Third Proportional to 144,430.50 and 221,520

Step by Step Solution

1. Step 1: Write the proportion equation
   144,430.50 : 221,520 = 221,520 : x
2. Step 2: Convert to fraction form
   144,430.50/221,520 = 221,520/x
3. Step 3: Cross multiply
   144,430.50x = 221,520 × 221,520
4. Step 4: Simplify right side
   144,430.50x = 49,071,110,400
5. Step 5: Solve for x
   x = 49,071,110,400/144,430.50
6. Step 6: Final answer
   x = 339,755.87