Finding the Third Proportional to 3,215,433 and 7,078,557

Step by Step Solution

1. Step 1: Write the proportion equation
   3,215,433 : 7,078,557 = 7,078,557 : x
2. Step 2: Convert to fraction form
   3,215,433/7,078,557 = 7,078,557/x
3. Step 3: Cross multiply
   3,215,433x = 7,078,557 × 7,078,557
4. Step 4: Simplify right side
   3,215,433x = 50,105,969,202,249
5. Step 5: Solve for x
   x = 50,105,969,202,249/3,215,433
6. Step 6: Final answer
   x = 15,582,961.67