Finding the Fourth Proportional to 2,234.61, 3,083.09 and 1,290.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,234.61 : 3,083.09 = 1,290.29 : x
2. Step 2: Convert to fraction form
   2,234.61/3,083.09 = 1,290.29/x
3. Step 3: Cross multiply
   2,234.61x = 3,083.09 × 1,290.29
4. Step 4: Simplify right side
   2,234.61x = 3,978,058.33
5. Step 5: Solve for x
   x = 3,978,058.33/2,234.61
6. Step 6: Final answer
   x = 1,780.20