Finding the Fourth Proportional to 2,603.85, 3,903.71 and 959.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,603.85 : 3,903.71 = 959.49 : x
2. Step 2: Convert to fraction form
   2,603.85/3,903.71 = 959.49/x
3. Step 3: Cross multiply
   2,603.85x = 3,903.71 × 959.49
4. Step 4: Simplify right side
   2,603.85x = 3,745,570.71
5. Step 5: Solve for x
   x = 3,745,570.71/2,603.85
6. Step 6: Final answer
   x = 1,438.47