Finding the Fourth Proportional to 2,604.15, 3,903.86 and 959.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,604.15 : 3,903.86 = 959.55 : x
2. Step 2: Convert to fraction form
   2,604.15/3,903.86 = 959.55/x
3. Step 3: Cross multiply
   2,604.15x = 3,903.86 × 959.55
4. Step 4: Simplify right side
   2,604.15x = 3,745,944.07
5. Step 5: Solve for x
   x = 3,745,944.07/2,604.15
6. Step 6: Final answer
   x = 1,438.45