Finding the Third Proportional to 12,105 and 18,694.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,105 : 18,694.69 = 18,694.69 : x
2. Step 2: Convert to fraction form
   12,105/18,694.69 = 18,694.69/x
3. Step 3: Cross multiply
   12,105x = 18,694.69 × 18,694.69
4. Step 4: Simplify right side
   12,105x = 349,491,340.72
5. Step 5: Solve for x
   x = 349,491,340.72/12,105
6. Step 6: Final answer
   x = 28,871.65