Finding the Fourth Proportional to 2,808.50, 4,213.25 and 959.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,808.50 : 4,213.25 = 959.18 : x
2. Step 2: Convert to fraction form
   2,808.50/4,213.25 = 959.18/x
3. Step 3: Cross multiply
   2,808.50x = 4,213.25 × 959.18
4. Step 4: Simplify right side
   2,808.50x = 4,041,265.61
5. Step 5: Solve for x
   x = 4,041,265.61/2,808.50
6. Step 6: Final answer
   x = 1,438.94