Finding the Third Proportional to 1,808,478 and 3,900,907

Step by Step Solution

1. Step 1: Write the proportion equation
   1,808,478 : 3,900,907 = 3,900,907 : x
2. Step 2: Convert to fraction form
   1,808,478/3,900,907 = 3,900,907/x
3. Step 3: Cross multiply
   1,808,478x = 3,900,907 × 3,900,907
4. Step 4: Simplify right side
   1,808,478x = 15,217,075,422,649
5. Step 5: Solve for x
   x = 15,217,075,422,649/1,808,478
6. Step 6: Final answer
   x = 8,414,299.44