Finding the Fourth Proportional to 2,603.58, 3,903.45 and 960.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,603.58 : 3,903.45 = 960.15 : x
2. Step 2: Convert to fraction form
   2,603.58/3,903.45 = 960.15/x
3. Step 3: Cross multiply
   2,603.58x = 3,903.45 × 960.15
4. Step 4: Simplify right side
   2,603.58x = 3,747,897.52
5. Step 5: Solve for x
   x = 3,747,897.52/2,603.58
6. Step 6: Final answer
   x = 1,439.52