Finding the Third Proportional to 3,215,430 and 7,078,551

Step by Step Solution

1. Step 1: Write the proportion equation
   3,215,430 : 7,078,551 = 7,078,551 : x
2. Step 2: Convert to fraction form
   3,215,430/7,078,551 = 7,078,551/x
3. Step 3: Cross multiply
   3,215,430x = 7,078,551 × 7,078,551
4. Step 4: Simplify right side
   3,215,430x = 50,105,884,259,601
5. Step 5: Solve for x
   x = 50,105,884,259,601/3,215,430
6. Step 6: Final answer
   x = 15,582,949.80