Finding the Third Proportional to 3,390,655 and 5,085,989

Step by Step Solution

1. Step 1: Write the proportion equation
   3,390,655 : 5,085,989 = 5,085,989 : x
2. Step 2: Convert to fraction form
   3,390,655/5,085,989 = 5,085,989/x
3. Step 3: Cross multiply
   3,390,655x = 5,085,989 × 5,085,989
4. Step 4: Simplify right side
   3,390,655x = 25,867,284,108,121
5. Step 5: Solve for x
   x = 25,867,284,108,121/3,390,655
6. Step 6: Final answer
   x = 7,628,993.25