Finding the Third Proportional to 14,430 and 21,099

Step by Step Solution

1. Step 1: Write the proportion equation
   14,430 : 21,099 = 21,099 : x
2. Step 2: Convert to fraction form
   14,430/21,099 = 21,099/x
3. Step 3: Cross multiply
   14,430x = 21,099 × 21,099
4. Step 4: Simplify right side
   14,430x = 445,167,801
5. Step 5: Solve for x
   x = 445,167,801/14,430
6. Step 6: Final answer
   x = 30,850.16