Finding the Fourth Proportional to 2,485.62, 3,728.84 and 842.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.62 : 3,728.84 = 842.27 : x
2. Step 2: Convert to fraction form
   2,485.62/3,728.84 = 842.27/x
3. Step 3: Cross multiply
   2,485.62x = 3,728.84 × 842.27
4. Step 4: Simplify right side
   2,485.62x = 3,140,667.21
5. Step 5: Solve for x
   x = 3,140,667.21/2,485.62
6. Step 6: Final answer
   x = 1,263.53