Finding the Third Proportional to 3,215,420 and 7,078,534

Step by Step Solution

1. Step 1: Write the proportion equation
   3,215,420 : 7,078,534 = 7,078,534 : x
2. Step 2: Convert to fraction form
   3,215,420/7,078,534 = 7,078,534/x
3. Step 3: Cross multiply
   3,215,420x = 7,078,534 × 7,078,534
4. Step 4: Simplify right side
   3,215,420x = 50,105,643,589,156
5. Step 5: Solve for x
   x = 50,105,643,589,156/3,215,420
6. Step 6: Final answer
   x = 15,582,923.41