Finding the Fourth Proportional to 2,959.91, 4,439.56 and 851.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,959.91 : 4,439.56 = 851.47 : x
2. Step 2: Convert to fraction form
   2,959.91/4,439.56 = 851.47/x
3. Step 3: Cross multiply
   2,959.91x = 4,439.56 × 851.47
4. Step 4: Simplify right side
   2,959.91x = 3,780,152.15
5. Step 5: Solve for x
   x = 3,780,152.15/2,959.91
6. Step 6: Final answer
   x = 1,277.12