Finding the Third Proportional to 1,302,978 and 1,993,216

Step by Step Solution

1. Step 1: Write the proportion equation
   1,302,978 : 1,993,216 = 1,993,216 : x
2. Step 2: Convert to fraction form
   1,302,978/1,993,216 = 1,993,216/x
3. Step 3: Cross multiply
   1,302,978x = 1,993,216 × 1,993,216
4. Step 4: Simplify right side
   1,302,978x = 3,972,910,022,656
5. Step 5: Solve for x
   x = 3,972,910,022,656/1,302,978
6. Step 6: Final answer
   x = 3,049,099.85