Finding the Third Proportional to 108,721.50 and 220,500

Step by Step Solution

1. Step 1: Write the proportion equation
   108,721.50 : 220,500 = 220,500 : x
2. Step 2: Convert to fraction form
   108,721.50/220,500 = 220,500/x
3. Step 3: Cross multiply
   108,721.50x = 220,500 × 220,500
4. Step 4: Simplify right side
   108,721.50x = 48,620,250,000
5. Step 5: Solve for x
   x = 48,620,250,000/108,721.50
6. Step 6: Final answer
   x = 447,199.96