Finding the Fourth Proportional to 2,055.92, 3,085.72 and 960.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,055.92 : 3,085.72 = 960.90 : x
2. Step 2: Convert to fraction form
   2,055.92/3,085.72 = 960.90/x
3. Step 3: Cross multiply
   2,055.92x = 3,085.72 × 960.90
4. Step 4: Simplify right side
   2,055.92x = 2,965,068.35
5. Step 5: Solve for x
   x = 2,965,068.35/2,055.92
6. Step 6: Final answer
   x = 1,442.21