Finding the Fourth Proportional to 2,431.69, 3,648.17 and 872.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,431.69 : 3,648.17 = 872.03 : x
2. Step 2: Convert to fraction form
   2,431.69/3,648.17 = 872.03/x
3. Step 3: Cross multiply
   2,431.69x = 3,648.17 × 872.03
4. Step 4: Simplify right side
   2,431.69x = 3,181,324.99
5. Step 5: Solve for x
   x = 3,181,324.99/2,431.69
6. Step 6: Final answer
   x = 1,308.28