Finding the Fourth Proportional to 5,238.81, 7,860.56 and 2,608.94

Step by Step Solution

1. Step 1: Write the proportion equation
   5,238.81 : 7,860.56 = 2,608.94 : x
2. Step 2: Convert to fraction form
   5,238.81/7,860.56 = 2,608.94/x
3. Step 3: Cross multiply
   5,238.81x = 7,860.56 × 2,608.94
4. Step 4: Simplify right side
   5,238.81x = 20,507,736.01
5. Step 5: Solve for x
   x = 20,507,736.01/5,238.81
6. Step 6: Final answer
   x = 3,914.58