Finding the Fourth Proportional to 3,105.52, 4,284.77 and 2,160.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,105.52 : 4,284.77 = 2,160.25 : x
2. Step 2: Convert to fraction form
   3,105.52/4,284.77 = 2,160.25/x
3. Step 3: Cross multiply
   3,105.52x = 4,284.77 × 2,160.25
4. Step 4: Simplify right side
   3,105.52x = 9,256,152.88
5. Step 5: Solve for x
   x = 9,256,152.88/3,105.52
6. Step 6: Final answer
   x = 2,980.55