Finding the Third Proportional to 12,128 and 17,392

Step by Step Solution

1. Step 1: Write the proportion equation
   12,128 : 17,392 = 17,392 : x
2. Step 2: Convert to fraction form
   12,128/17,392 = 17,392/x
3. Step 3: Cross multiply
   12,128x = 17,392 × 17,392
4. Step 4: Simplify right side
   12,128x = 302,481,664
5. Step 5: Solve for x
   x = 302,481,664/12,128
6. Step 6: Final answer
   x = 24,940.77