Finding the Fourth Proportional to 5,103.98, 7,043.43 and 2,865.80

Step by Step Solution

1. Step 1: Write the proportion equation
   5,103.98 : 7,043.43 = 2,865.80 : x
2. Step 2: Convert to fraction form
   5,103.98/7,043.43 = 2,865.80/x
3. Step 3: Cross multiply
   5,103.98x = 7,043.43 × 2,865.80
4. Step 4: Simplify right side
   5,103.98x = 20,185,061.69
5. Step 5: Solve for x
   x = 20,185,061.69/5,103.98
6. Step 6: Final answer
   x = 3,954.77