Finding the Fourth Proportional to 3,945.57, 5,914.35 and 2,559.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,945.57 : 5,914.35 = 2,559.78 : x
2. Step 2: Convert to fraction form
   3,945.57/5,914.35 = 2,559.78/x
3. Step 3: Cross multiply
   3,945.57x = 5,914.35 × 2,559.78
4. Step 4: Simplify right side
   3,945.57x = 15,139,434.84
5. Step 5: Solve for x
   x = 15,139,434.84/3,945.57
6. Step 6: Final answer
   x = 3,837.07