Finding the Fourth Proportional to 5,188.56, 7,156.89 and 3,171.03

Step by Step Solution

1. Step 1: Write the proportion equation
   5,188.56 : 7,156.89 = 3,171.03 : x
2. Step 2: Convert to fraction form
   5,188.56/7,156.89 = 3,171.03/x
3. Step 3: Cross multiply
   5,188.56x = 7,156.89 × 3,171.03
4. Step 4: Simplify right side
   5,188.56x = 22,694,712.90
5. Step 5: Solve for x
   x = 22,694,712.90/5,188.56
6. Step 6: Final answer
   x = 4,373.99