Finding the Fourth Proportional to 2,603.86, 3,903.38 and 959.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,603.86 : 3,903.38 = 959.15 : x
2. Step 2: Convert to fraction form
   2,603.86/3,903.38 = 959.15/x
3. Step 3: Cross multiply
   2,603.86x = 3,903.38 × 959.15
4. Step 4: Simplify right side
   2,603.86x = 3,743,922.13
5. Step 5: Solve for x
   x = 3,743,922.13/2,603.86
6. Step 6: Final answer
   x = 1,437.84