Finding the Fourth Proportional to 3,953.79, 5,456.12 and 2,185.37

Step by Step Solution

1. Step 1: Write the proportion equation
   3,953.79 : 5,456.12 = 2,185.37 : x
2. Step 2: Convert to fraction form
   3,953.79/5,456.12 = 2,185.37/x
3. Step 3: Cross multiply
   3,953.79x = 5,456.12 × 2,185.37
4. Step 4: Simplify right side
   3,953.79x = 11,923,602.76
5. Step 5: Solve for x
   x = 11,923,602.76/3,953.79
6. Step 6: Final answer
   x = 3,015.74