Finding the Fourth Proportional to 3,131.04, 4,321.56 and 1,805.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,131.04 : 4,321.56 = 1,805.50 : x
2. Step 2: Convert to fraction form
   3,131.04/4,321.56 = 1,805.50/x
3. Step 3: Cross multiply
   3,131.04x = 4,321.56 × 1,805.50
4. Step 4: Simplify right side
   3,131.04x = 7,802,576.58
5. Step 5: Solve for x
   x = 7,802,576.58/3,131.04
6. Step 6: Final answer
   x = 2,492.01