Finding the Fourth Proportional to 2,066.59, 3,099.64 and 679.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,066.59 : 3,099.64 = 679.94 : x
2. Step 2: Convert to fraction form
   2,066.59/3,099.64 = 679.94/x
3. Step 3: Cross multiply
   2,066.59x = 3,099.64 × 679.94
4. Step 4: Simplify right side
   2,066.59x = 2,107,569.22
5. Step 5: Solve for x
   x = 2,107,569.22/2,066.59
6. Step 6: Final answer
   x = 1,019.83