Finding the Fourth Proportional to 5,196.98, 7,171.80 and 2,839.07

Step by Step Solution

1. Step 1: Write the proportion equation
   5,196.98 : 7,171.80 = 2,839.07 : x
2. Step 2: Convert to fraction form
   5,196.98/7,171.80 = 2,839.07/x
3. Step 3: Cross multiply
   5,196.98x = 7,171.80 × 2,839.07
4. Step 4: Simplify right side
   5,196.98x = 20,361,242.23
5. Step 5: Solve for x
   x = 20,361,242.23/5,196.98
6. Step 6: Final answer
   x = 3,917.90