Finding the Third Proportional to 67,629.75 and 144,640.50

Step by Step Solution

1. Step 1: Write the proportion equation
   67,629.75 : 144,640.50 = 144,640.50 : x
2. Step 2: Convert to fraction form
   67,629.75/144,640.50 = 144,640.50/x
3. Step 3: Cross multiply
   67,629.75x = 144,640.50 × 144,640.50
4. Step 4: Simplify right side
   67,629.75x = 20,920,874,240.25
5. Step 5: Solve for x
   x = 20,920,874,240.25/67,629.75
6. Step 6: Final answer
   x = 309,344.25