Finding the Fourth Proportional to 3,955.59, 5,456.43 and 2,558.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,955.59 : 5,456.43 = 2,558.34 : x
2. Step 2: Convert to fraction form
   3,955.59/5,456.43 = 2,558.34/x
3. Step 3: Cross multiply
   3,955.59x = 5,456.43 × 2,558.34
4. Step 4: Simplify right side
   3,955.59x = 13,959,403.13
5. Step 5: Solve for x
   x = 13,959,403.13/3,955.59
6. Step 6: Final answer
   x = 3,529.03