Finding the Fourth Proportional to 2,485.85, 3,728.20 and 730.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.85 : 3,728.20 = 730.38 : x
2. Step 2: Convert to fraction form
   2,485.85/3,728.20 = 730.38/x
3. Step 3: Cross multiply
   2,485.85x = 3,728.20 × 730.38
4. Step 4: Simplify right side
   2,485.85x = 2,723,002.72
5. Step 5: Solve for x
   x = 2,723,002.72/2,485.85
6. Step 6: Final answer
   x = 1,095.40