Finding the Third Proportional to 14,272 and 21,280

Step by Step Solution

1. Step 1: Write the proportion equation
   14,272 : 21,280 = 21,280 : x
2. Step 2: Convert to fraction form
   14,272/21,280 = 21,280/x
3. Step 3: Cross multiply
   14,272x = 21,280 × 21,280
4. Step 4: Simplify right side
   14,272x = 452,838,400
5. Step 5: Solve for x
   x = 452,838,400/14,272
6. Step 6: Final answer
   x = 31,729.15