Finding the Third Proportional to 646,110 and 1,420,578

Step by Step Solution

1. Step 1: Write the proportion equation
   646,110 : 1,420,578 = 1,420,578 : x
2. Step 2: Convert to fraction form
   646,110/1,420,578 = 1,420,578/x
3. Step 3: Cross multiply
   646,110x = 1,420,578 × 1,420,578
4. Step 4: Simplify right side
   646,110x = 2,018,041,854,084
5. Step 5: Solve for x
   x = 2,018,041,854,084/646,110
6. Step 6: Final answer
   x = 3,123,371.96