Finding the Fourth Proportional to 3,574.96, 4,932.66 and 2,158.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,574.96 : 4,932.66 = 2,158.72 : x
2. Step 2: Convert to fraction form
   3,574.96/4,932.66 = 2,158.72/x
3. Step 3: Cross multiply
   3,574.96x = 4,932.66 × 2,158.72
4. Step 4: Simplify right side
   3,574.96x = 10,648,231.80
5. Step 5: Solve for x
   x = 10,648,231.80/3,574.96
6. Step 6: Final answer
   x = 2,978.56