Finding the Fourth Proportional to 3,953.60, 5,455.89 and 2,185.29

Step by Step Solution

1. Step 1: Write the proportion equation
   3,953.60 : 5,455.89 = 2,185.29 : x
2. Step 2: Convert to fraction form
   3,953.60/5,455.89 = 2,185.29/x
3. Step 3: Cross multiply
   3,953.60x = 5,455.89 × 2,185.29
4. Step 4: Simplify right side
   3,953.60x = 11,922,701.86
5. Step 5: Solve for x
   x = 11,922,701.86/3,953.60
6. Step 6: Final answer
   x = 3,015.66