Finding the Third Proportional to 380,780 and 836,300

Step by Step Solution

1. Step 1: Write the proportion equation
   380,780 : 836,300 = 836,300 : x
2. Step 2: Convert to fraction form
   380,780/836,300 = 836,300/x
3. Step 3: Cross multiply
   380,780x = 836,300 × 836,300
4. Step 4: Simplify right side
   380,780x = 699,397,690,000
5. Step 5: Solve for x
   x = 699,397,690,000/380,780
6. Step 6: Final answer
   x = 1,836,750.07