Finding the Third Proportional to 664,856 and 1,368,916

Step by Step Solution

1. Step 1: Write the proportion equation
   664,856 : 1,368,916 = 1,368,916 : x
2. Step 2: Convert to fraction form
   664,856/1,368,916 = 1,368,916/x
3. Step 3: Cross multiply
   664,856x = 1,368,916 × 1,368,916
4. Step 4: Simplify right side
   664,856x = 1,873,931,015,056
5. Step 5: Solve for x
   x = 1,873,931,015,056/664,856
6. Step 6: Final answer
   x = 2,818,551.71