Finding the Third Proportional to 12,156 and 18,514

Step by Step Solution

1. Step 1: Write the proportion equation
   12,156 : 18,514 = 18,514 : x
2. Step 2: Convert to fraction form
   12,156/18,514 = 18,514/x
3. Step 3: Cross multiply
   12,156x = 18,514 × 18,514
4. Step 4: Simplify right side
   12,156x = 342,768,196
5. Step 5: Solve for x
   x = 342,768,196/12,156
6. Step 6: Final answer
   x = 28,197.45