Finding the Third Proportional to 67,620 and 144,621

Step by Step Solution

1. Step 1: Write the proportion equation
   67,620 : 144,621 = 144,621 : x
2. Step 2: Convert to fraction form
   67,620/144,621 = 144,621/x
3. Step 3: Cross multiply
   67,620x = 144,621 × 144,621
4. Step 4: Simplify right side
   67,620x = 20,915,233,641
5. Step 5: Solve for x
   x = 20,915,233,641/67,620
6. Step 6: Final answer
   x = 309,305.44