Finding the Third Proportional to 220,993.50 and 345,705

Step by Step Solution

1. Step 1: Write the proportion equation
   220,993.50 : 345,705 = 345,705 : x
2. Step 2: Convert to fraction form
   220,993.50/345,705 = 345,705/x
3. Step 3: Cross multiply
   220,993.50x = 345,705 × 345,705
4. Step 4: Simplify right side
   220,993.50x = 119,511,947,025
5. Step 5: Solve for x
   x = 119,511,947,025/220,993.50
6. Step 6: Final answer
   x = 540,793.95