Finding the Third Proportional to 67,408 and 144,992

Step by Step Solution

1. Step 1: Write the proportion equation
   67,408 : 144,992 = 144,992 : x
2. Step 2: Convert to fraction form
   67,408/144,992 = 144,992/x
3. Step 3: Cross multiply
   67,408x = 144,992 × 144,992
4. Step 4: Simplify right side
   67,408x = 21,022,680,064
5. Step 5: Solve for x
   x = 21,022,680,064/67,408
6. Step 6: Final answer
   x = 311,872.18