Finding the Third Proportional to 12,704 and 13,856

Step by Step Solution

1. Step 1: Write the proportion equation
   12,704 : 13,856 = 13,856 : x
2. Step 2: Convert to fraction form
   12,704/13,856 = 13,856/x
3. Step 3: Cross multiply
   12,704x = 13,856 × 13,856
4. Step 4: Simplify right side
   12,704x = 191,988,736
5. Step 5: Solve for x
   x = 191,988,736/12,704
6. Step 6: Final answer
   x = 15,112.46