Finding the Fourth Proportional to 3,105.80, 4,660.86 and 1,159.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,105.80 : 4,660.86 = 1,159.72 : x
2. Step 2: Convert to fraction form
   3,105.80/4,660.86 = 1,159.72/x
3. Step 3: Cross multiply
   3,105.80x = 4,660.86 × 1,159.72
4. Step 4: Simplify right side
   3,105.80x = 5,405,292.56
5. Step 5: Solve for x
   x = 5,405,292.56/3,105.80
6. Step 6: Final answer
   x = 1,740.39