Finding the Third Proportional to 2,078,978 and 3,109,971

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078,978 : 3,109,971 = 3,109,971 : x
2. Step 2: Convert to fraction form
   2,078,978/3,109,971 = 3,109,971/x
3. Step 3: Cross multiply
   2,078,978x = 3,109,971 × 3,109,971
4. Step 4: Simplify right side
   2,078,978x = 9,671,919,620,841
5. Step 5: Solve for x
   x = 9,671,919,620,841/2,078,978
6. Step 6: Final answer
   x = 4,652,247.22