Finding the Fourth Proportional to 3,171.59, 4,757.69 and 1,091.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,171.59 : 4,757.69 = 1,091.31 : x
2. Step 2: Convert to fraction form
   3,171.59/4,757.69 = 1,091.31/x
3. Step 3: Cross multiply
   3,171.59x = 4,757.69 × 1,091.31
4. Step 4: Simplify right side
   3,171.59x = 5,192,117.40
5. Step 5: Solve for x
   x = 5,192,117.40/3,171.59
6. Step 6: Final answer
   x = 1,637.07