Finding the Third Proportional to 857,216 and 1,866,824

Step by Step Solution

1. Step 1: Write the proportion equation
   857,216 : 1,866,824 = 1,866,824 : x
2. Step 2: Convert to fraction form
   857,216/1,866,824 = 1,866,824/x
3. Step 3: Cross multiply
   857,216x = 1,866,824 × 1,866,824
4. Step 4: Simplify right side
   857,216x = 3,485,031,846,976
5. Step 5: Solve for x
   x = 3,485,031,846,976/857,216
6. Step 6: Final answer
   x = 4,065,523.56