Finding the Fourth Proportional to 5,711.33, 7,887.81 and 3,923.51

Step by Step Solution

1. Step 1: Write the proportion equation
   5,711.33 : 7,887.81 = 3,923.51 : x
2. Step 2: Convert to fraction form
   5,711.33/7,887.81 = 3,923.51/x
3. Step 3: Cross multiply
   5,711.33x = 7,887.81 × 3,923.51
4. Step 4: Simplify right side
   5,711.33x = 30,947,861.97
5. Step 5: Solve for x
   x = 30,947,861.97/5,711.33
6. Step 6: Final answer
   x = 5,418.68