Finding the Third Proportional to 388,948 and 804,856

Step by Step Solution

1. Step 1: Write the proportion equation
   388,948 : 804,856 = 804,856 : x
2. Step 2: Convert to fraction form
   388,948/804,856 = 804,856/x
3. Step 3: Cross multiply
   388,948x = 804,856 × 804,856
4. Step 4: Simplify right side
   388,948x = 647,793,180,736
5. Step 5: Solve for x
   x = 647,793,180,736/388,948
6. Step 6: Final answer
   x = 1,665,500.74