Finding the Third Proportional to 67,280 and 142,760

Step by Step Solution

1. Step 1: Write the proportion equation
   67,280 : 142,760 = 142,760 : x
2. Step 2: Convert to fraction form
   67,280/142,760 = 142,760/x
3. Step 3: Cross multiply
   67,280x = 142,760 × 142,760
4. Step 4: Simplify right side
   67,280x = 20,380,417,600
5. Step 5: Solve for x
   x = 20,380,417,600/67,280
6. Step 6: Final answer
   x = 302,919.41