Finding the Fourth Proportional to 2,891.34, 3,989.15 and 1,771.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,891.34 : 3,989.15 = 1,771.73 : x
2. Step 2: Convert to fraction form
   2,891.34/3,989.15 = 1,771.73/x
3. Step 3: Cross multiply
   2,891.34x = 3,989.15 × 1,771.73
4. Step 4: Simplify right side
   2,891.34x = 7,067,667.93
5. Step 5: Solve for x
   x = 7,067,667.93/2,891.34
6. Step 6: Final answer
   x = 2,444.43