Finding the Fourth Proportional to 2,659.39, 3,989.94 and 994.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,659.39 : 3,989.94 = 994.38 : x
2. Step 2: Convert to fraction form
   2,659.39/3,989.94 = 994.38/x
3. Step 3: Cross multiply
   2,659.39x = 3,989.94 × 994.38
4. Step 4: Simplify right side
   2,659.39x = 3,967,516.54
5. Step 5: Solve for x
   x = 3,967,516.54/2,659.39
6. Step 6: Final answer
   x = 1,491.89