Finding the Fourth Proportional to 3,872.71, 5,804.31 and 1,789.90

Step by Step Solution

1. Step 1: Write the proportion equation
   3,872.71 : 5,804.31 = 1,789.90 : x
2. Step 2: Convert to fraction form
   3,872.71/5,804.31 = 1,789.90/x
3. Step 3: Cross multiply
   3,872.71x = 5,804.31 × 1,789.90
4. Step 4: Simplify right side
   3,872.71x = 10,389,111.01
5. Step 5: Solve for x
   x = 10,389,111.01/3,872.71
6. Step 6: Final answer
   x = 2,682.65