Finding the Fourth Proportional to 2,485.73, 3,729.28 and 842.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.73 : 3,729.28 = 842.41 : x
2. Step 2: Convert to fraction form
   2,485.73/3,729.28 = 842.41/x
3. Step 3: Cross multiply
   2,485.73x = 3,729.28 × 842.41
4. Step 4: Simplify right side
   2,485.73x = 3,141,559.91
5. Step 5: Solve for x
   x = 3,141,559.91/2,485.73
6. Step 6: Final answer
   x = 1,263.84