Finding the Third Proportional to 67,389 and 144,620

Step by Step Solution

1. Step 1: Write the proportion equation
   67,389 : 144,620 = 144,620 : x
2. Step 2: Convert to fraction form
   67,389/144,620 = 144,620/x
3. Step 3: Cross multiply
   67,389x = 144,620 × 144,620
4. Step 4: Simplify right side
   67,389x = 20,914,944,400
5. Step 5: Solve for x
   x = 20,914,944,400/67,389
6. Step 6: Final answer
   x = 310,361.40