Finding the Third Proportional to 3,215,423 and 7,078,543

Step by Step Solution

1. Step 1: Write the proportion equation
   3,215,423 : 7,078,543 = 7,078,543 : x
2. Step 2: Convert to fraction form
   3,215,423/7,078,543 = 7,078,543/x
3. Step 3: Cross multiply
   3,215,423x = 7,078,543 × 7,078,543
4. Step 4: Simplify right side
   3,215,423x = 50,105,771,002,849
5. Step 5: Solve for x
   x = 50,105,771,002,849/3,215,423
6. Step 6: Final answer
   x = 15,582,948.50