Finding the Third Proportional to 685,876 and 1,068,078

Step by Step Solution

1. Step 1: Write the proportion equation
   685,876 : 1,068,078 = 1,068,078 : x
2. Step 2: Convert to fraction form
   685,876/1,068,078 = 1,068,078/x
3. Step 3: Cross multiply
   685,876x = 1,068,078 × 1,068,078
4. Step 4: Simplify right side
   685,876x = 1,140,790,614,084
5. Step 5: Solve for x
   x = 1,140,790,614,084/685,876
6. Step 6: Final answer
   x = 1,663,260.73