Finding the Third Proportional to 685,856 and 1,068,036

Step by Step Solution

1. Step 1: Write the proportion equation
   685,856 : 1,068,036 = 1,068,036 : x
2. Step 2: Convert to fraction form
   685,856/1,068,036 = 1,068,036/x
3. Step 3: Cross multiply
   685,856x = 1,068,036 × 1,068,036
4. Step 4: Simplify right side
   685,856x = 1,140,700,897,296
5. Step 5: Solve for x
   x = 1,140,700,897,296/685,856
6. Step 6: Final answer
   x = 1,663,178.42