Finding the Third Proportional to 15,708 and 21,969

Step by Step Solution

1. Step 1: Write the proportion equation
   15,708 : 21,969 = 21,969 : x
2. Step 2: Convert to fraction form
   15,708/21,969 = 21,969/x
3. Step 3: Cross multiply
   15,708x = 21,969 × 21,969
4. Step 4: Simplify right side
   15,708x = 482,636,961
5. Step 5: Solve for x
   x = 482,636,961/15,708
6. Step 6: Final answer
   x = 30,725.55