Finding the Fourth Proportional to 5,103.47, 7,042.78 and 2,865.39

Step by Step Solution

1. Step 1: Write the proportion equation
   5,103.47 : 7,042.78 = 2,865.39 : x
2. Step 2: Convert to fraction form
   5,103.47/7,042.78 = 2,865.39/x
3. Step 3: Cross multiply
   5,103.47x = 7,042.78 × 2,865.39
4. Step 4: Simplify right side
   5,103.47x = 20,180,311.38
5. Step 5: Solve for x
   x = 20,180,311.38/5,103.47
6. Step 6: Final answer
   x = 3,954.23