Finding the Third Proportional to 89,800 and 188,900

Step by Step Solution

1. Step 1: Write the proportion equation
   89,800 : 188,900 = 188,900 : x
2. Step 2: Convert to fraction form
   89,800/188,900 = 188,900/x
3. Step 3: Cross multiply
   89,800x = 188,900 × 188,900
4. Step 4: Simplify right side
   89,800x = 35,683,210,000
5. Step 5: Solve for x
   x = 35,683,210,000/89,800
6. Step 6: Final answer
   x = 397,363.14