Finding the Fourth Proportional to 3,105.79, 4,661.12 and 1,158.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,105.79 : 4,661.12 = 1,158.10 : x
2. Step 2: Convert to fraction form
   3,105.79/4,661.12 = 1,158.10/x
3. Step 3: Cross multiply
   3,105.79x = 4,661.12 × 1,158.10
4. Step 4: Simplify right side
   3,105.79x = 5,398,043.07
5. Step 5: Solve for x
   x = 5,398,043.07/3,105.79
6. Step 6: Final answer
   x = 1,738.06