Finding the Third Proportional to 388,630 and 836,308

Step by Step Solution

1. Step 1: Write the proportion equation
   388,630 : 836,308 = 836,308 : x
2. Step 2: Convert to fraction form
   388,630/836,308 = 836,308/x
3. Step 3: Cross multiply
   388,630x = 836,308 × 836,308
4. Step 4: Simplify right side
   388,630x = 699,411,070,864
5. Step 5: Solve for x
   x = 699,411,070,864/388,630
6. Step 6: Final answer
   x = 1,799,683.69