Finding the Fourth Proportional to 2,275.61, 3,411.69 and 959.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,275.61 : 3,411.69 = 959.76 : x
2. Step 2: Convert to fraction form
   2,275.61/3,411.69 = 959.76/x
3. Step 3: Cross multiply
   2,275.61x = 3,411.69 × 959.76
4. Step 4: Simplify right side
   2,275.61x = 3,274,400.00
5. Step 5: Solve for x
   x = 3,274,400.00/2,275.61
6. Step 6: Final answer
   x = 1,438.91