Finding the Third Proportional to 3,857,460 and 8,400,684

Step by Step Solution

1. Step 1: Write the proportion equation
   3,857,460 : 8,400,684 = 8,400,684 : x
2. Step 2: Convert to fraction form
   3,857,460/8,400,684 = 8,400,684/x
3. Step 3: Cross multiply
   3,857,460x = 8,400,684 × 8,400,684
4. Step 4: Simplify right side
   3,857,460x = 70,571,491,667,856
5. Step 5: Solve for x
   x = 70,571,491,667,856/3,857,460
6. Step 6: Final answer
   x = 18,294,808.41