Finding the Third Proportional to 67,287 and 144,230

Step by Step Solution

1. Step 1: Write the proportion equation
   67,287 : 144,230 = 144,230 : x
2. Step 2: Convert to fraction form
   67,287/144,230 = 144,230/x
3. Step 3: Cross multiply
   67,287x = 144,230 × 144,230
4. Step 4: Simplify right side
   67,287x = 20,802,292,900
5. Step 5: Solve for x
   x = 20,802,292,900/67,287
6. Step 6: Final answer
   x = 309,157.68