Finding the Fourth Proportional to 5,731.15, 7,912.89 and 5,133.37

Step by Step Solution

1. Step 1: Write the proportion equation
   5,731.15 : 7,912.89 = 5,133.37 : x
2. Step 2: Convert to fraction form
   5,731.15/7,912.89 = 5,133.37/x
3. Step 3: Cross multiply
   5,731.15x = 7,912.89 × 5,133.37
4. Step 4: Simplify right side
   5,731.15x = 40,619,792.14
5. Step 5: Solve for x
   x = 40,619,792.14/5,731.15
6. Step 6: Final answer
   x = 7,087.55