Finding the Fourth Proportional to 3,182.27, 4,772.85 and 842.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,182.27 : 4,772.85 = 842.30 : x
2. Step 2: Convert to fraction form
   3,182.27/4,772.85 = 842.30/x
3. Step 3: Cross multiply
   3,182.27x = 4,772.85 × 842.30
4. Step 4: Simplify right side
   3,182.27x = 4,020,147.69
5. Step 5: Solve for x
   x = 4,020,147.69/3,182.27
6. Step 6: Final answer
   x = 1,263.30