Finding the Third Proportional to 89,687 and 188,668

Step by Step Solution

1. Step 1: Write the proportion equation
   89,687 : 188,668 = 188,668 : x
2. Step 2: Convert to fraction form
   89,687/188,668 = 188,668/x
3. Step 3: Cross multiply
   89,687x = 188,668 × 188,668
4. Step 4: Simplify right side
   89,687x = 35,595,614,224
5. Step 5: Solve for x
   x = 35,595,614,224/89,687
6. Step 6: Final answer
   x = 396,887.11