Finding the Fourth Proportional to 5,176.18, 7,143.42 and 2,818.30

Step by Step Solution

1. Step 1: Write the proportion equation
   5,176.18 : 7,143.42 = 2,818.30 : x
2. Step 2: Convert to fraction form
   5,176.18/7,143.42 = 2,818.30/x
3. Step 3: Cross multiply
   5,176.18x = 7,143.42 × 2,818.30
4. Step 4: Simplify right side
   5,176.18x = 20,132,300.59
5. Step 5: Solve for x
   x = 20,132,300.59/5,176.18
6. Step 6: Final answer
   x = 3,889.41