Finding the Third Proportional to 12,108 and 16,240

Step by Step Solution

1. Step 1: Write the proportion equation
   12,108 : 16,240 = 16,240 : x
2. Step 2: Convert to fraction form
   12,108/16,240 = 16,240/x
3. Step 3: Cross multiply
   12,108x = 16,240 × 16,240
4. Step 4: Simplify right side
   12,108x = 263,737,600
5. Step 5: Solve for x
   x = 263,737,600/12,108
6. Step 6: Final answer
   x = 21,782.09