Finding the Third Proportional to 102,016.50 and 220,980

Step by Step Solution

1. Step 1: Write the proportion equation
   102,016.50 : 220,980 = 220,980 : x
2. Step 2: Convert to fraction form
   102,016.50/220,980 = 220,980/x
3. Step 3: Cross multiply
   102,016.50x = 220,980 × 220,980
4. Step 4: Simplify right side
   102,016.50x = 48,832,160,400
5. Step 5: Solve for x
   x = 48,832,160,400/102,016.50
6. Step 6: Final answer
   x = 478,669.24