Finding the Third Proportional to 143,676 and 215,514

Step by Step Solution

1. Step 1: Write the proportion equation
   143,676 : 215,514 = 215,514 : x
2. Step 2: Convert to fraction form
   143,676/215,514 = 215,514/x
3. Step 3: Cross multiply
   143,676x = 215,514 × 215,514
4. Step 4: Simplify right side
   143,676x = 46,446,284,196
5. Step 5: Solve for x
   x = 46,446,284,196/143,676
6. Step 6: Final answer
   x = 323,271