Finding the Third Proportional to 15,171 and 21,069

Step by Step Solution

1. Step 1: Write the proportion equation
   15,171 : 21,069 = 21,069 : x
2. Step 2: Convert to fraction form
   15,171/21,069 = 21,069/x
3. Step 3: Cross multiply
   15,171x = 21,069 × 21,069
4. Step 4: Simplify right side
   15,171x = 443,902,761
5. Step 5: Solve for x
   x = 443,902,761/15,171
6. Step 6: Final answer
   x = 29,259.95