Finding the Fourth Proportional to 3,187.89, 4,399.31 and 1,771.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,187.89 : 4,399.31 = 1,771.61 : x
2. Step 2: Convert to fraction form
   3,187.89/4,399.31 = 1,771.61/x
3. Step 3: Cross multiply
   3,187.89x = 4,399.31 × 1,771.61
4. Step 4: Simplify right side
   3,187.89x = 7,793,844.02
5. Step 5: Solve for x
   x = 7,793,844.02/3,187.89
6. Step 6: Final answer
   x = 2,444.83