Finding the Third Proportional to 187,729 and 388,766

Step by Step Solution

1. Step 1: Write the proportion equation
   187,729 : 388,766 = 388,766 : x
2. Step 2: Convert to fraction form
   187,729/388,766 = 388,766/x
3. Step 3: Cross multiply
   187,729x = 388,766 × 388,766
4. Step 4: Simplify right side
   187,729x = 151,139,002,756
5. Step 5: Solve for x
   x = 151,139,002,756/187,729
6. Step 6: Final answer
   x = 805,091.40