Finding the Third Proportional to 105,853.50 and 220,455

Step by Step Solution

1. Step 1: Write the proportion equation
   105,853.50 : 220,455 = 220,455 : x
2. Step 2: Convert to fraction form
   105,853.50/220,455 = 220,455/x
3. Step 3: Cross multiply
   105,853.50x = 220,455 × 220,455
4. Step 4: Simplify right side
   105,853.50x = 48,600,407,025
5. Step 5: Solve for x
   x = 48,600,407,025/105,853.50
6. Step 6: Final answer
   x = 459,128.96