Finding the Third Proportional to 86,631 and 188,058

Step by Step Solution

1. Step 1: Write the proportion equation
   86,631 : 188,058 = 188,058 : x
2. Step 2: Convert to fraction form
   86,631/188,058 = 188,058/x
3. Step 3: Cross multiply
   86,631x = 188,058 × 188,058
4. Step 4: Simplify right side
   86,631x = 35,365,811,364
5. Step 5: Solve for x
   x = 35,365,811,364/86,631
6. Step 6: Final answer
   x = 408,235.06