Finding the Third Proportional to 3,807,420 and 8,309,367

Step by Step Solution

1. Step 1: Write the proportion equation
   3,807,420 : 8,309,367 = 8,309,367 : x
2. Step 2: Convert to fraction form
   3,807,420/8,309,367 = 8,309,367/x
3. Step 3: Cross multiply
   3,807,420x = 8,309,367 × 8,309,367
4. Step 4: Simplify right side
   3,807,420x = 69,045,579,940,689
5. Step 5: Solve for x
   x = 69,045,579,940,689/3,807,420
6. Step 6: Final answer
   x = 18,134,479.50