Finding the Third Proportional to 12,928 and 17,272

Step by Step Solution

1. Step 1: Write the proportion equation
   12,928 : 17,272 = 17,272 : x
2. Step 2: Convert to fraction form
   12,928/17,272 = 17,272/x
3. Step 3: Cross multiply
   12,928x = 17,272 × 17,272
4. Step 4: Simplify right side
   12,928x = 298,321,984
5. Step 5: Solve for x
   x = 298,321,984/12,928
6. Step 6: Final answer
   x = 23,075.65