Finding the Third Proportional to 3,810,367 and 8,218,990

Step by Step Solution

1. Step 1: Write the proportion equation
   3,810,367 : 8,218,990 = 8,218,990 : x
2. Step 2: Convert to fraction form
   3,810,367/8,218,990 = 8,218,990/x
3. Step 3: Cross multiply
   3,810,367x = 8,218,990 × 8,218,990
4. Step 4: Simplify right side
   3,810,367x = 67,551,796,620,100
5. Step 5: Solve for x
   x = 67,551,796,620,100/3,810,367
6. Step 6: Final answer
   x = 17,728,422.65