Finding the Fourth Proportional to 5,196.71, 7,171.61 and 2,958.90

Step by Step Solution

1. Step 1: Write the proportion equation
   5,196.71 : 7,171.61 = 2,958.90 : x
2. Step 2: Convert to fraction form
   5,196.71/7,171.61 = 2,958.90/x
3. Step 3: Cross multiply
   5,196.71x = 7,171.61 × 2,958.90
4. Step 4: Simplify right side
   5,196.71x = 21,220,120.62
5. Step 5: Solve for x
   x = 21,220,120.62/5,196.71
6. Step 6: Final answer
   x = 4,083.38