Finding the Third Proportional to 140,510 and 215,443

Step by Step Solution

1. Step 1: Write the proportion equation
   140,510 : 215,443 = 215,443 : x
2. Step 2: Convert to fraction form
   140,510/215,443 = 215,443/x
3. Step 3: Cross multiply
   140,510x = 215,443 × 215,443
4. Step 4: Simplify right side
   140,510x = 46,415,686,249
5. Step 5: Solve for x
   x = 46,415,686,249/140,510
6. Step 6: Final answer
   x = 330,337.24