Finding the Fourth Proportional to 5,196.56, 7,171.74 and 2,839.05

Step by Step Solution

1. Step 1: Write the proportion equation
   5,196.56 : 7,171.74 = 2,839.05 : x
2. Step 2: Convert to fraction form
   5,196.56/7,171.74 = 2,839.05/x
3. Step 3: Cross multiply
   5,196.56x = 7,171.74 × 2,839.05
4. Step 4: Simplify right side
   5,196.56x = 20,360,928.45
5. Step 5: Solve for x
   x = 20,360,928.45/5,196.56
6. Step 6: Final answer
   x = 3,918.16