Finding the Third Proportional to 12,108 and 19,215

Step by Step Solution

1. Step 1: Write the proportion equation
   12,108 : 19,215 = 19,215 : x
2. Step 2: Convert to fraction form
   12,108/19,215 = 19,215/x
3. Step 3: Cross multiply
   12,108x = 19,215 × 19,215
4. Step 4: Simplify right side
   12,108x = 369,216,225
5. Step 5: Solve for x
   x = 369,216,225/12,108
6. Step 6: Final answer
   x = 30,493.58