Finding the Fourth Proportional to 3,573.92, 4,931.60 and 2,081.64

Step by Step Solution

1. Step 1: Write the proportion equation
   3,573.92 : 4,931.60 = 2,081.64 : x
2. Step 2: Convert to fraction form
   3,573.92/4,931.60 = 2,081.64/x
3. Step 3: Cross multiply
   3,573.92x = 4,931.60 × 2,081.64
4. Step 4: Simplify right side
   3,573.92x = 10,265,815.82
5. Step 5: Solve for x
   x = 10,265,815.82/3,573.92
6. Step 6: Final answer
   x = 2,872.42