Finding the Third Proportional to 67,920 and 146,280

Step by Step Solution

1. Step 1: Write the proportion equation
   67,920 : 146,280 = 146,280 : x
2. Step 2: Convert to fraction form
   67,920/146,280 = 146,280/x
3. Step 3: Cross multiply
   67,920x = 146,280 × 146,280
4. Step 4: Simplify right side
   67,920x = 21,397,838,400
5. Step 5: Solve for x
   x = 21,397,838,400/67,920
6. Step 6: Final answer
   x = 315,044.73