Finding the Fourth Proportional to 2,485.42, 3,728.04 and 636.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.42 : 3,728.04 = 636.55 : x
2. Step 2: Convert to fraction form
   2,485.42/3,728.04 = 636.55/x
3. Step 3: Cross multiply
   2,485.42x = 3,728.04 × 636.55
4. Step 4: Simplify right side
   2,485.42x = 2,373,077.01
5. Step 5: Solve for x
   x = 2,373,077.01/2,485.42
6. Step 6: Final answer
   x = 954.80