Finding the Third Proportional to 389,084 and 836,290

Step by Step Solution

1. Step 1: Write the proportion equation
   389,084 : 836,290 = 836,290 : x
2. Step 2: Convert to fraction form
   389,084/836,290 = 836,290/x
3. Step 3: Cross multiply
   389,084x = 836,290 × 836,290
4. Step 4: Simplify right side
   389,084x = 699,380,964,100
5. Step 5: Solve for x
   x = 699,380,964,100/389,084
6. Step 6: Final answer
   x = 1,797,506.36