Finding the Third Proportional to 12,107 and 18,507

Step by Step Solution

1. Step 1: Write the proportion equation
   12,107 : 18,507 = 18,507 : x
2. Step 2: Convert to fraction form
   12,107/18,507 = 18,507/x
3. Step 3: Cross multiply
   12,107x = 18,507 × 18,507
4. Step 4: Simplify right side
   12,107x = 342,509,049
5. Step 5: Solve for x
   x = 342,509,049/12,107
6. Step 6: Final answer
   x = 28,290.17