Finding the Third Proportional to 100,911.50 and 221,504

Step by Step Solution

1. Step 1: Write the proportion equation
   100,911.50 : 221,504 = 221,504 : x
2. Step 2: Convert to fraction form
   100,911.50/221,504 = 221,504/x
3. Step 3: Cross multiply
   100,911.50x = 221,504 × 221,504
4. Step 4: Simplify right side
   100,911.50x = 49,064,022,016
5. Step 5: Solve for x
   x = 49,064,022,016/100,911.50
6. Step 6: Final answer
   x = 486,208.43