Finding the Third Proportional to 2,906,144 and 3,989,340

Step by Step Solution

1. Step 1: Write the proportion equation
   2,906,144 : 3,989,340 = 3,989,340 : x
2. Step 2: Convert to fraction form
   2,906,144/3,989,340 = 3,989,340/x
3. Step 3: Cross multiply
   2,906,144x = 3,989,340 × 3,989,340
4. Step 4: Simplify right side
   2,906,144x = 15,914,833,635,600
5. Step 5: Solve for x
   x = 15,914,833,635,600/2,906,144
6. Step 6: Final answer
   x = 5,476,271.53