Finding the Third Proportional to 3,879,344 and 8,430,176

Step by Step Solution

1. Step 1: Write the proportion equation
   3,879,344 : 8,430,176 = 8,430,176 : x
2. Step 2: Convert to fraction form
   3,879,344/8,430,176 = 8,430,176/x
3. Step 3: Cross multiply
   3,879,344x = 8,430,176 × 8,430,176
4. Step 4: Simplify right side
   3,879,344x = 71,067,867,390,976
5. Step 5: Solve for x
   x = 71,067,867,390,976/3,879,344
6. Step 6: Final answer
   x = 18,319,558.00