Finding the Third Proportional to 1,512,978 and 3,226,212

Step by Step Solution

1. Step 1: Write the proportion equation
   1,512,978 : 3,226,212 = 3,226,212 : x
2. Step 2: Convert to fraction form
   1,512,978/3,226,212 = 3,226,212/x
3. Step 3: Cross multiply
   1,512,978x = 3,226,212 × 3,226,212
4. Step 4: Simplify right side
   1,512,978x = 10,408,443,868,944
5. Step 5: Solve for x
   x = 10,408,443,868,944/1,512,978
6. Step 6: Final answer
   x = 6,879,441.65