Finding the Third Proportional to 188,205 and 391,898

Step by Step Solution

1. Step 1: Write the proportion equation
   188,205 : 391,898 = 391,898 : x
2. Step 2: Convert to fraction form
   188,205/391,898 = 391,898/x
3. Step 3: Cross multiply
   188,205x = 391,898 × 391,898
4. Step 4: Simplify right side
   188,205x = 153,584,042,404
5. Step 5: Solve for x
   x = 153,584,042,404/188,205
6. Step 6: Final answer
   x = 816,046.56