Finding the Third Proportional to 12,186 and 18,429

Step by Step Solution

1. Step 1: Write the proportion equation
   12,186 : 18,429 = 18,429 : x
2. Step 2: Convert to fraction form
   12,186/18,429 = 18,429/x
3. Step 3: Cross multiply
   12,186x = 18,429 × 18,429
4. Step 4: Simplify right side
   12,186x = 339,628,041
5. Step 5: Solve for x
   x = 339,628,041/12,186
6. Step 6: Final answer
   x = 27,870.35