Finding the Fourth Proportional to 3,923.72, 5,887.60 and 2,608.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,923.72 : 5,887.60 = 2,608.38 : x
2. Step 2: Convert to fraction form
   3,923.72/5,887.60 = 2,608.38/x
3. Step 3: Cross multiply
   3,923.72x = 5,887.60 × 2,608.38
4. Step 4: Simplify right side
   3,923.72x = 15,357,091.57
5. Step 5: Solve for x
   x = 15,357,091.57/3,923.72
6. Step 6: Final answer
   x = 3,913.92