Finding the Third Proportional to 105,818 and 220,404

Step by Step Solution

1. Step 1: Write the proportion equation
   105,818 : 220,404 = 220,404 : x
2. Step 2: Convert to fraction form
   105,818/220,404 = 220,404/x
3. Step 3: Cross multiply
   105,818x = 220,404 × 220,404
4. Step 4: Simplify right side
   105,818x = 48,577,923,216
5. Step 5: Solve for x
   x = 48,577,923,216/105,818
6. Step 6: Final answer
   x = 459,070.51