Finding the Fourth Proportional to 5,171.42, 7,136.52 and 2,813.57

Step by Step Solution

1. Step 1: Write the proportion equation
   5,171.42 : 7,136.52 = 2,813.57 : x
2. Step 2: Convert to fraction form
   5,171.42/7,136.52 = 2,813.57/x
3. Step 3: Cross multiply
   5,171.42x = 7,136.52 × 2,813.57
4. Step 4: Simplify right side
   5,171.42x = 20,079,062.89
5. Step 5: Solve for x
   x = 20,079,062.89/5,171.42
6. Step 6: Final answer
   x = 3,882.70