Finding the Third Proportional to 67,647 and 144,678

Step by Step Solution

1. Step 1: Write the proportion equation
   67,647 : 144,678 = 144,678 : x
2. Step 2: Convert to fraction form
   67,647/144,678 = 144,678/x
3. Step 3: Cross multiply
   67,647x = 144,678 × 144,678
4. Step 4: Simplify right side
   67,647x = 20,931,723,684
5. Step 5: Solve for x
   x = 20,931,723,684/67,647
6. Step 6: Final answer
   x = 309,425.75