Finding the Fourth Proportional to 3,131.10, 4,320.81 and 1,804.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,131.10 : 4,320.81 = 1,804.59 : x
2. Step 2: Convert to fraction form
   3,131.10/4,320.81 = 1,804.59/x
3. Step 3: Cross multiply
   3,131.10x = 4,320.81 × 1,804.59
4. Step 4: Simplify right side
   3,131.10x = 7,797,290.52
5. Step 5: Solve for x
   x = 7,797,290.52/3,131.10
6. Step 6: Final answer
   x = 2,490.27