Finding the Third Proportional to 179,870 and 388,555

Step by Step Solution

1. Step 1: Write the proportion equation
   179,870 : 388,555 = 388,555 : x
2. Step 2: Convert to fraction form
   179,870/388,555 = 388,555/x
3. Step 3: Cross multiply
   179,870x = 388,555 × 388,555
4. Step 4: Simplify right side
   179,870x = 150,974,988,025
5. Step 5: Solve for x
   x = 150,974,988,025/179,870
6. Step 6: Final answer
   x = 839,356.14