Finding the Third Proportional to 3,215,439 and 7,078,569

Step by Step Solution

1. Step 1: Write the proportion equation
   3,215,439 : 7,078,569 = 7,078,569 : x
2. Step 2: Convert to fraction form
   3,215,439/7,078,569 = 7,078,569/x
3. Step 3: Cross multiply
   3,215,439x = 7,078,569 × 7,078,569
4. Step 4: Simplify right side
   3,215,439x = 50,106,139,087,761
5. Step 5: Solve for x
   x = 50,106,139,087,761/3,215,439
6. Step 6: Final answer
   x = 15,582,985.43