Finding the Fourth Proportional to 3,894.72, 5,843.31 and 2,664.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,894.72 : 5,843.31 = 2,664.55 : x
2. Step 2: Convert to fraction form
   3,894.72/5,843.31 = 2,664.55/x
3. Step 3: Cross multiply
   3,894.72x = 5,843.31 × 2,664.55
4. Step 4: Simplify right side
   3,894.72x = 15,569,791.66
5. Step 5: Solve for x
   x = 15,569,791.66/3,894.72
6. Step 6: Final answer
   x = 3,997.67