Finding the Third Proportional to 12,904 and 17,160

Step by Step Solution

1. Step 1: Write the proportion equation
   12,904 : 17,160 = 17,160 : x
2. Step 2: Convert to fraction form
   12,904/17,160 = 17,160/x
3. Step 3: Cross multiply
   12,904x = 17,160 × 17,160
4. Step 4: Simplify right side
   12,904x = 294,465,600
5. Step 5: Solve for x
   x = 294,465,600/12,904
6. Step 6: Final answer
   x = 22,819.71