Finding the Third Proportional to 89,706 and 188,712

Step by Step Solution

1. Step 1: Write the proportion equation
   89,706 : 188,712 = 188,712 : x
2. Step 2: Convert to fraction form
   89,706/188,712 = 188,712/x
3. Step 3: Cross multiply
   89,706x = 188,712 × 188,712
4. Step 4: Simplify right side
   89,706x = 35,612,218,944
5. Step 5: Solve for x
   x = 35,612,218,944/89,706
6. Step 6: Final answer
   x = 396,988.15