Finding the Fourth Proportional to 2,603.64, 3,905.06 and 959.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,603.64 : 3,905.06 = 959.82 : x
2. Step 2: Convert to fraction form
   2,603.64/3,905.06 = 959.82/x
3. Step 3: Cross multiply
   2,603.64x = 3,905.06 × 959.82
4. Step 4: Simplify right side
   2,603.64x = 3,748,149.89
5. Step 5: Solve for x
   x = 3,748,149.89/2,603.64
6. Step 6: Final answer
   x = 1,439.58