Finding the Third Proportional to 12,147 and 18,258

Step by Step Solution

1. Step 1: Write the proportion equation
   12,147 : 18,258 = 18,258 : x
2. Step 2: Convert to fraction form
   12,147/18,258 = 18,258/x
3. Step 3: Cross multiply
   12,147x = 18,258 × 18,258
4. Step 4: Simplify right side
   12,147x = 333,354,564
5. Step 5: Solve for x
   x = 333,354,564/12,147
6. Step 6: Final answer
   x = 27,443.37