Finding the Third Proportional to 15,708 and 17,940

Step by Step Solution

1. Step 1: Write the proportion equation
   15,708 : 17,940 = 17,940 : x
2. Step 2: Convert to fraction form
   15,708/17,940 = 17,940/x
3. Step 3: Cross multiply
   15,708x = 17,940 × 17,940
4. Step 4: Simplify right side
   15,708x = 321,843,600
5. Step 5: Solve for x
   x = 321,843,600/15,708
6. Step 6: Final answer
   x = 20,489.15