Finding the Fourth Proportional to 3,131.39, 4,320.69 and 1,804.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,131.39 : 4,320.69 = 1,804.76 : x
2. Step 2: Convert to fraction form
   3,131.39/4,320.69 = 1,804.76/x
3. Step 3: Cross multiply
   3,131.39x = 4,320.69 × 1,804.76
4. Step 4: Simplify right side
   3,131.39x = 7,797,808.48
5. Step 5: Solve for x
   x = 7,797,808.48/3,131.39
6. Step 6: Final answer
   x = 2,490.21