Finding the Fourth Proportional to 2,233.89, 3,083.19 and 1,290.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,233.89 : 3,083.19 = 1,290.24 : x
2. Step 2: Convert to fraction form
   2,233.89/3,083.19 = 1,290.24/x
3. Step 3: Cross multiply
   2,233.89x = 3,083.19 × 1,290.24
4. Step 4: Simplify right side
   2,233.89x = 3,978,055.07
5. Step 5: Solve for x
   x = 3,978,055.07/2,233.89
6. Step 6: Final answer
   x = 1,780.77