Finding the Fourth Proportional to 5,185.57, 7,156.56 and 3,168.85

Step by Step Solution

1. Step 1: Write the proportion equation
   5,185.57 : 7,156.56 = 3,168.85 : x
2. Step 2: Convert to fraction form
   5,185.57/7,156.56 = 3,168.85/x
3. Step 3: Cross multiply
   5,185.57x = 7,156.56 × 3,168.85
4. Step 4: Simplify right side
   5,185.57x = 22,678,065.16
5. Step 5: Solve for x
   x = 22,678,065.16/5,185.57
6. Step 6: Final answer
   x = 4,373.30