Finding the Third Proportional to 3,901,424 and 8,378,086

Step by Step Solution

1. Step 1: Write the proportion equation
   3,901,424 : 8,378,086 = 8,378,086 : x
2. Step 2: Convert to fraction form
   3,901,424/8,378,086 = 8,378,086/x
3. Step 3: Cross multiply
   3,901,424x = 8,378,086 × 8,378,086
4. Step 4: Simplify right side
   3,901,424x = 70,192,325,023,396
5. Step 5: Solve for x
   x = 70,192,325,023,396/3,901,424
6. Step 6: Final answer
   x = 17,991,462.87