Finding the Third Proportional to 391,850 and 800,300

Step by Step Solution

1. Step 1: Write the proportion equation
   391,850 : 800,300 = 800,300 : x
2. Step 2: Convert to fraction form
   391,850/800,300 = 800,300/x
3. Step 3: Cross multiply
   391,850x = 800,300 × 800,300
4. Step 4: Simplify right side
   391,850x = 640,480,090,000
5. Step 5: Solve for x
   x = 640,480,090,000/391,850
6. Step 6: Final answer
   x = 1,634,503.23