Finding the Third Proportional to 3,390,986 and 5,121,039

Step by Step Solution

1. Step 1: Write the proportion equation
   3,390,986 : 5,121,039 = 5,121,039 : x
2. Step 2: Convert to fraction form
   3,390,986/5,121,039 = 5,121,039/x
3. Step 3: Cross multiply
   3,390,986x = 5,121,039 × 5,121,039
4. Step 4: Simplify right side
   3,390,986x = 26,225,040,439,521
5. Step 5: Solve for x
   x = 26,225,040,439,521/3,390,986
6. Step 6: Final answer
   x = 7,733,750.73