Finding the Fourth Proportional to 3,447.89, 5,171.75 and 1,107.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,447.89 : 5,171.75 = 1,107.89 : x
2. Step 2: Convert to fraction form
   3,447.89/5,171.75 = 1,107.89/x
3. Step 3: Cross multiply
   3,447.89x = 5,171.75 × 1,107.89
4. Step 4: Simplify right side
   3,447.89x = 5,729,724.57
5. Step 5: Solve for x
   x = 5,729,724.57/3,447.89
6. Step 6: Final answer
   x = 1,661.81