Finding the Fourth Proportional to 2,603.06, 3,902.76 and 959.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,603.06 : 3,902.76 = 959.40 : x
2. Step 2: Convert to fraction form
   2,603.06/3,902.76 = 959.40/x
3. Step 3: Cross multiply
   2,603.06x = 3,902.76 × 959.40
4. Step 4: Simplify right side
   2,603.06x = 3,744,288.43
5. Step 5: Solve for x
   x = 3,744,288.43/2,603.06
6. Step 6: Final answer
   x = 1,438.42