Finding the Fourth Proportional to 3,953.56, 5,456.02 and 2,185.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,953.56 : 5,456.02 = 2,185.28 : x
2. Step 2: Convert to fraction form
   3,953.56/5,456.02 = 2,185.28/x
3. Step 3: Cross multiply
   3,953.56x = 5,456.02 × 2,185.28
4. Step 4: Simplify right side
   3,953.56x = 11,922,931.39
5. Step 5: Solve for x
   x = 11,922,931.39/3,953.56
6. Step 6: Final answer
   x = 3,015.75