Finding the Fourth Proportional to 2,105.85, 3,158.77 and 1,130.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.85 : 3,158.77 = 1,130.61 : x
2. Step 2: Convert to fraction form
   2,105.85/3,158.77 = 1,130.61/x
3. Step 3: Cross multiply
   2,105.85x = 3,158.77 × 1,130.61
4. Step 4: Simplify right side
   2,105.85x = 3,571,336.95
5. Step 5: Solve for x
   x = 3,571,336.95/2,105.85
6. Step 6: Final answer
   x = 1,695.91