Finding the Third Proportional to 1,388,676 and 2,860,424

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388,676 : 2,860,424 = 2,860,424 : x
2. Step 2: Convert to fraction form
   1,388,676/2,860,424 = 2,860,424/x
3. Step 3: Cross multiply
   1,388,676x = 2,860,424 × 2,860,424
4. Step 4: Simplify right side
   1,388,676x = 8,182,025,459,776
5. Step 5: Solve for x
   x = 8,182,025,459,776/1,388,676
6. Step 6: Final answer
   x = 5,891,961.45