Finding the Fourth Proportional to 3,872.59, 5,804.12 and 1,789.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,872.59 : 5,804.12 = 1,789.78 : x
2. Step 2: Convert to fraction form
   3,872.59/5,804.12 = 1,789.78/x
3. Step 3: Cross multiply
   3,872.59x = 5,804.12 × 1,789.78
4. Step 4: Simplify right side
   3,872.59x = 10,388,059.92
5. Step 5: Solve for x
   x = 10,388,059.92/3,872.59
6. Step 6: Final answer
   x = 2,682.46