Finding the Third Proportional to 105,879 and 220,470

Step by Step Solution

1. Step 1: Write the proportion equation
   105,879 : 220,470 = 220,470 : x
2. Step 2: Convert to fraction form
   105,879/220,470 = 220,470/x
3. Step 3: Cross multiply
   105,879x = 220,470 × 220,470
4. Step 4: Simplify right side
   105,879x = 48,607,020,900
5. Step 5: Solve for x
   x = 48,607,020,900/105,879
6. Step 6: Final answer
   x = 459,080.85