Finding the Third Proportional to 3,857,470 and 8,400,704

Step by Step Solution

1. Step 1: Write the proportion equation
   3,857,470 : 8,400,704 = 8,400,704 : x
2. Step 2: Convert to fraction form
   3,857,470/8,400,704 = 8,400,704/x
3. Step 3: Cross multiply
   3,857,470x = 8,400,704 × 8,400,704
4. Step 4: Simplify right side
   3,857,470x = 70,571,827,695,616
5. Step 5: Solve for x
   x = 70,571,827,695,616/3,857,470
6. Step 6: Final answer
   x = 18,294,848.10