Finding the Third Proportional to 3,660,278 and 5,280,401

Step by Step Solution

1. Step 1: Write the proportion equation
   3,660,278 : 5,280,401 = 5,280,401 : x
2. Step 2: Convert to fraction form
   3,660,278/5,280,401 = 5,280,401/x
3. Step 3: Cross multiply
   3,660,278x = 5,280,401 × 5,280,401
4. Step 4: Simplify right side
   3,660,278x = 27,882,634,720,801
5. Step 5: Solve for x
   x = 27,882,634,720,801/3,660,278
6. Step 6: Final answer
   x = 7,617,627.60