Finding the Third Proportional to 14,388 and 21,012

Step by Step Solution

1. Step 1: Write the proportion equation
   14,388 : 21,012 = 21,012 : x
2. Step 2: Convert to fraction form
   14,388/21,012 = 21,012/x
3. Step 3: Cross multiply
   14,388x = 21,012 × 21,012
4. Step 4: Simplify right side
   14,388x = 441,504,144
5. Step 5: Solve for x
   x = 441,504,144/14,388
6. Step 6: Final answer
   x = 30,685.58