Finding the Third Proportional to 142,649 and 220,760

Step by Step Solution

1. Step 1: Write the proportion equation
   142,649 : 220,760 = 220,760 : x
2. Step 2: Convert to fraction form
   142,649/220,760 = 220,760/x
3. Step 3: Cross multiply
   142,649x = 220,760 × 220,760
4. Step 4: Simplify right side
   142,649x = 48,734,977,600
5. Step 5: Solve for x
   x = 48,734,977,600/142,649
6. Step 6: Final answer
   x = 341,642.62