Finding the Fourth Proportional to 2,105.20, 3,155.37 and 995.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.20 : 3,155.37 = 995.32 : x
2. Step 2: Convert to fraction form
   2,105.20/3,155.37 = 995.32/x
3. Step 3: Cross multiply
   2,105.20x = 3,155.37 × 995.32
4. Step 4: Simplify right side
   2,105.20x = 3,140,602.87
5. Step 5: Solve for x
   x = 3,140,602.87/2,105.20
6. Step 6: Final answer
   x = 1,491.83