Finding the Fourth Proportional to 3,953.48, 5,455.72 and 2,185.16

Step by Step Solution

1. Step 1: Write the proportion equation
   3,953.48 : 5,455.72 = 2,185.16 : x
2. Step 2: Convert to fraction form
   3,953.48/5,455.72 = 2,185.16/x
3. Step 3: Cross multiply
   3,953.48x = 5,455.72 × 2,185.16
4. Step 4: Simplify right side
   3,953.48x = 11,921,588.37
5. Step 5: Solve for x
   x = 11,921,588.37/3,953.48
6. Step 6: Final answer
   x = 3,015.47