Finding the Third Proportional to 67,981 and 145,805

Step by Step Solution

1. Step 1: Write the proportion equation
   67,981 : 145,805 = 145,805 : x
2. Step 2: Convert to fraction form
   67,981/145,805 = 145,805/x
3. Step 3: Cross multiply
   67,981x = 145,805 × 145,805
4. Step 4: Simplify right side
   67,981x = 21,259,098,025
5. Step 5: Solve for x
   x = 21,259,098,025/67,981
6. Step 6: Final answer
   x = 312,721.17