Finding the Fourth Proportional to 2,603.24, 3,905.76 and 959.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,603.24 : 3,905.76 = 959.78 : x
2. Step 2: Convert to fraction form
   2,603.24/3,905.76 = 959.78/x
3. Step 3: Cross multiply
   2,603.24x = 3,905.76 × 959.78
4. Step 4: Simplify right side
   2,603.24x = 3,748,670.33
5. Step 5: Solve for x
   x = 3,748,670.33/2,603.24
6. Step 6: Final answer
   x = 1,440.00