Finding the Third Proportional to 2,431,978 and 5,279,323

Step by Step Solution

1. Step 1: Write the proportion equation
   2,431,978 : 5,279,323 = 5,279,323 : x
2. Step 2: Convert to fraction form
   2,431,978/5,279,323 = 5,279,323/x
3. Step 3: Cross multiply
   2,431,978x = 5,279,323 × 5,279,323
4. Step 4: Simplify right side
   2,431,978x = 27,871,251,338,329
5. Step 5: Solve for x
   x = 27,871,251,338,329/2,431,978
6. Step 6: Final answer
   x = 11,460,322.15