Finding the Third Proportional to 12,870 and 17,214

Step by Step Solution

1. Step 1: Write the proportion equation
   12,870 : 17,214 = 17,214 : x
2. Step 2: Convert to fraction form
   12,870/17,214 = 17,214/x
3. Step 3: Cross multiply
   12,870x = 17,214 × 17,214
4. Step 4: Simplify right side
   12,870x = 296,321,796
5. Step 5: Solve for x
   x = 296,321,796/12,870
6. Step 6: Final answer
   x = 23,024.23