Finding the Third Proportional to 2,906,168 and 3,989,378

Step by Step Solution

1. Step 1: Write the proportion equation
   2,906,168 : 3,989,378 = 3,989,378 : x
2. Step 2: Convert to fraction form
   2,906,168/3,989,378 = 3,989,378/x
3. Step 3: Cross multiply
   2,906,168x = 3,989,378 × 3,989,378
4. Step 4: Simplify right side
   2,906,168x = 15,915,136,826,884
5. Step 5: Solve for x
   x = 15,915,136,826,884/2,906,168
6. Step 6: Final answer
   x = 5,476,330.63