Finding the Fourth Proportional to 2,808.55, 4,212.69 and 959.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,808.55 : 4,212.69 = 959.59 : x
2. Step 2: Convert to fraction form
   2,808.55/4,212.69 = 959.59/x
3. Step 3: Cross multiply
   2,808.55x = 4,212.69 × 959.59
4. Step 4: Simplify right side
   2,808.55x = 4,042,455.20
5. Step 5: Solve for x
   x = 4,042,455.20/2,808.55
6. Step 6: Final answer
   x = 1,439.34