Finding the Third Proportional to 401,976 and 851,616

Step by Step Solution

1. Step 1: Write the proportion equation
   401,976 : 851,616 = 851,616 : x
2. Step 2: Convert to fraction form
   401,976/851,616 = 851,616/x
3. Step 3: Cross multiply
   401,976x = 851,616 × 851,616
4. Step 4: Simplify right side
   401,976x = 725,249,811,456
5. Step 5: Solve for x
   x = 725,249,811,456/401,976
6. Step 6: Final answer
   x = 1,804,211.72