Finding the Third Proportional to 3,360,921 and 5,165,978

Step by Step Solution

1. Step 1: Write the proportion equation
   3,360,921 : 5,165,978 = 5,165,978 : x
2. Step 2: Convert to fraction form
   3,360,921/5,165,978 = 5,165,978/x
3. Step 3: Cross multiply
   3,360,921x = 5,165,978 × 5,165,978
4. Step 4: Simplify right side
   3,360,921x = 26,687,328,696,484
5. Step 5: Solve for x
   x = 26,687,328,696,484/3,360,921
6. Step 6: Final answer
   x = 7,940,480.81