Finding the Third Proportional to 3,871,839 and 8,349,849

Step by Step Solution

1. Step 1: Write the proportion equation
   3,871,839 : 8,349,849 = 8,349,849 : x
2. Step 2: Convert to fraction form
   3,871,839/8,349,849 = 8,349,849/x
3. Step 3: Cross multiply
   3,871,839x = 8,349,849 × 8,349,849
4. Step 4: Simplify right side
   3,871,839x = 69,719,978,322,801
5. Step 5: Solve for x
   x = 69,719,978,322,801/3,871,839
6. Step 6: Final answer
   x = 18,006,941.49