Finding the Third Proportional to 3,857,468 and 8,400,700

Step by Step Solution

1. Step 1: Write the proportion equation
   3,857,468 : 8,400,700 = 8,400,700 : x
2. Step 2: Convert to fraction form
   3,857,468/8,400,700 = 8,400,700/x
3. Step 3: Cross multiply
   3,857,468x = 8,400,700 × 8,400,700
4. Step 4: Simplify right side
   3,857,468x = 70,571,760,490,000
5. Step 5: Solve for x
   x = 70,571,760,490,000/3,857,468
6. Step 6: Final answer
   x = 18,294,840.16