Finding the Third Proportional to 89,712 and 188,718

Step by Step Solution

1. Step 1: Write the proportion equation
   89,712 : 188,718 = 188,718 : x
2. Step 2: Convert to fraction form
   89,712/188,718 = 188,718/x
3. Step 3: Cross multiply
   89,712x = 188,718 × 188,718
4. Step 4: Simplify right side
   89,712x = 35,614,483,524
5. Step 5: Solve for x
   x = 35,614,483,524/89,712
6. Step 6: Final answer
   x = 396,986.84