Finding the Fourth Proportional to 3,171.15, 4,755.78 and 1,090.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,171.15 : 4,755.78 = 1,090.80 : x
2. Step 2: Convert to fraction form
   3,171.15/4,755.78 = 1,090.80/x
3. Step 3: Cross multiply
   3,171.15x = 4,755.78 × 1,090.80
4. Step 4: Simplify right side
   3,171.15x = 5,187,604.82
5. Step 5: Solve for x
   x = 5,187,604.82/3,171.15
6. Step 6: Final answer
   x = 1,635.87