Finding the Third Proportional to 12,540 and 19,479

Step by Step Solution

1. Step 1: Write the proportion equation
   12,540 : 19,479 = 19,479 : x
2. Step 2: Convert to fraction form
   12,540/19,479 = 19,479/x
3. Step 3: Cross multiply
   12,540x = 19,479 × 19,479
4. Step 4: Simplify right side
   12,540x = 379,431,441
5. Step 5: Solve for x
   x = 379,431,441/12,540
6. Step 6: Final answer
   x = 30,257.69