Finding the Fourth Proportional to 5,086.71, 7,017.44 and 2,989.89

Step by Step Solution

1. Step 1: Write the proportion equation
   5,086.71 : 7,017.44 = 2,989.89 : x
2. Step 2: Convert to fraction form
   5,086.71/7,017.44 = 2,989.89/x
3. Step 3: Cross multiply
   5,086.71x = 7,017.44 × 2,989.89
4. Step 4: Simplify right side
   5,086.71x = 20,981,358.73
5. Step 5: Solve for x
   x = 20,981,358.73/5,086.71
6. Step 6: Final answer
   x = 4,124.74