Finding the Third Proportional to 12,904 and 17,408

Step by Step Solution

1. Step 1: Write the proportion equation
   12,904 : 17,408 = 17,408 : x
2. Step 2: Convert to fraction form
   12,904/17,408 = 17,408/x
3. Step 3: Cross multiply
   12,904x = 17,408 × 17,408
4. Step 4: Simplify right side
   12,904x = 303,038,464
5. Step 5: Solve for x
   x = 303,038,464/12,904
6. Step 6: Final answer
   x = 23,484.07