Finding the Fourth Proportional to 5,147.71, 7,103.88 and 2,789.85

Step by Step Solution

1. Step 1: Write the proportion equation
   5,147.71 : 7,103.88 = 2,789.85 : x
2. Step 2: Convert to fraction form
   5,147.71/7,103.88 = 2,789.85/x
3. Step 3: Cross multiply
   5,147.71x = 7,103.88 × 2,789.85
4. Step 4: Simplify right side
   5,147.71x = 19,818,710.15
5. Step 5: Solve for x
   x = 19,818,710.15/5,147.71
6. Step 6: Final answer
   x = 3,850.01