Finding the Fourth Proportional to 5,196.78, 7,171.44 and 2,838.96

Step by Step Solution

1. Step 1: Write the proportion equation
   5,196.78 : 7,171.44 = 2,838.96 : x
2. Step 2: Convert to fraction form
   5,196.78/7,171.44 = 2,838.96/x
3. Step 3: Cross multiply
   5,196.78x = 7,171.44 × 2,838.96
4. Step 4: Simplify right side
   5,196.78x = 20,359,431.30
5. Step 5: Solve for x
   x = 20,359,431.30/5,196.78
6. Step 6: Final answer
   x = 3,917.70