Finding the Fourth Proportional to 5,143.98, 7,098.69 and 2,786.10

Step by Step Solution

1. Step 1: Write the proportion equation
   5,143.98 : 7,098.69 = 2,786.10 : x
2. Step 2: Convert to fraction form
   5,143.98/7,098.69 = 2,786.10/x
3. Step 3: Cross multiply
   5,143.98x = 7,098.69 × 2,786.10
4. Step 4: Simplify right side
   5,143.98x = 19,777,660.21
5. Step 5: Solve for x
   x = 19,777,660.21/5,143.98
6. Step 6: Final answer
   x = 3,844.82