Finding the Third Proportional to 86,869 and 188,398

Step by Step Solution

1. Step 1: Write the proportion equation
   86,869 : 188,398 = 188,398 : x
2. Step 2: Convert to fraction form
   86,869/188,398 = 188,398/x
3. Step 3: Cross multiply
   86,869x = 188,398 × 188,398
4. Step 4: Simplify right side
   86,869x = 35,493,806,404
5. Step 5: Solve for x
   x = 35,493,806,404/86,869
6. Step 6: Final answer
   x = 408,590.02