Finding the Fourth Proportional to 2,853.56, 4,271.61 and 2,121.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,853.56 : 4,271.61 = 2,121.32 : x
2. Step 2: Convert to fraction form
   2,853.56/4,271.61 = 2,121.32/x
3. Step 3: Cross multiply
   2,853.56x = 4,271.61 × 2,121.32
4. Step 4: Simplify right side
   2,853.56x = 9,061,451.73
5. Step 5: Solve for x
   x = 9,061,451.73/2,853.56
6. Step 6: Final answer
   x = 3,175.49