Finding the Third Proportional to 399,002 and 853,300

Step by Step Solution

1. Step 1: Write the proportion equation
   399,002 : 853,300 = 853,300 : x
2. Step 2: Convert to fraction form
   399,002/853,300 = 853,300/x
3. Step 3: Cross multiply
   399,002x = 853,300 × 853,300
4. Step 4: Simplify right side
   399,002x = 728,120,890,000
5. Step 5: Solve for x
   x = 728,120,890,000/399,002
6. Step 6: Final answer
   x = 1,824,855.24