Finding the Third Proportional to 99,981 and 215,514

Step by Step Solution

1. Step 1: Write the proportion equation
   99,981 : 215,514 = 215,514 : x
2. Step 2: Convert to fraction form
   99,981/215,514 = 215,514/x
3. Step 3: Cross multiply
   99,981x = 215,514 × 215,514
4. Step 4: Simplify right side
   99,981x = 46,446,284,196
5. Step 5: Solve for x
   x = 46,446,284,196/99,981
6. Step 6: Final answer
   x = 464,551.11