Finding the Fourth Proportional to 3,131.01, 4,320.72 and 1,804.64

Step by Step Solution

1. Step 1: Write the proportion equation
   3,131.01 : 4,320.72 = 1,804.64 : x
2. Step 2: Convert to fraction form
   3,131.01/4,320.72 = 1,804.64/x
3. Step 3: Cross multiply
   3,131.01x = 4,320.72 × 1,804.64
4. Step 4: Simplify right side
   3,131.01x = 7,797,322.54
5. Step 5: Solve for x
   x = 7,797,322.54/3,131.01
6. Step 6: Final answer
   x = 2,490.35