Finding the Third Proportional to 3,117,640 and 7,284,218

Step by Step Solution

1. Step 1: Write the proportion equation
   3,117,640 : 7,284,218 = 7,284,218 : x
2. Step 2: Convert to fraction form
   3,117,640/7,284,218 = 7,284,218/x
3. Step 3: Cross multiply
   3,117,640x = 7,284,218 × 7,284,218
4. Step 4: Simplify right side
   3,117,640x = 53,059,831,871,524
5. Step 5: Solve for x
   x = 53,059,831,871,524/3,117,640
6. Step 6: Final answer
   x = 17,019,229.89