Finding the Third Proportional to 15,456 and 17,670

Step by Step Solution

1. Step 1: Write the proportion equation
   15,456 : 17,670 = 17,670 : x
2. Step 2: Convert to fraction form
   15,456/17,670 = 17,670/x
3. Step 3: Cross multiply
   15,456x = 17,670 × 17,670
4. Step 4: Simplify right side
   15,456x = 312,228,900
5. Step 5: Solve for x
   x = 312,228,900/15,456
6. Step 6: Final answer
   x = 20,201.15