Finding the Fourth Proportional to 2,099,399.12, 3,149,598.42 and 679,455.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,099,399.12 : 3,149,598.42 = 679,455.20 : x
2. Step 2: Convert to fraction form
   2,099,399.12/3,149,598.42 = 679,455.20/x
3. Step 3: Cross multiply
   2,099,399.12x = 3,149,598.42 × 679,455.20
4. Step 4: Simplify right side
   2,099,399.12x = 2,140,011,008,632.79
5. Step 5: Solve for x
   x = 2,140,011,008,632.79/2,099,399.12
6. Step 6: Final answer
   x = 1,019,344.53