Finding the Fourth Proportional to 2,066.31, 3,099.34 and 679.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,066.31 : 3,099.34 = 679.45 : x
2. Step 2: Convert to fraction form
   2,066.31/3,099.34 = 679.45/x
3. Step 3: Cross multiply
   2,066.31x = 3,099.34 × 679.45
4. Step 4: Simplify right side
   2,066.31x = 2,105,846.56
5. Step 5: Solve for x
   x = 2,105,846.56/2,066.31
6. Step 6: Final answer
   x = 1,019.13