Finding the Third Proportional to 178,869 and 388,799

Step by Step Solution

1. Step 1: Write the proportion equation
   178,869 : 388,799 = 388,799 : x
2. Step 2: Convert to fraction form
   178,869/388,799 = 388,799/x
3. Step 3: Cross multiply
   178,869x = 388,799 × 388,799
4. Step 4: Simplify right side
   178,869x = 151,164,662,401
5. Step 5: Solve for x
   x = 151,164,662,401/178,869
6. Step 6: Final answer
   x = 845,113.81