Finding the Fourth Proportional to 2,234.82, 3,083.58 and 1,290.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,234.82 : 3,083.58 = 1,290.61 : x
2. Step 2: Convert to fraction form
   2,234.82/3,083.58 = 1,290.61/x
3. Step 3: Cross multiply
   2,234.82x = 3,083.58 × 1,290.61
4. Step 4: Simplify right side
   2,234.82x = 3,979,691.47
5. Step 5: Solve for x
   x = 3,979,691.47/2,234.82
6. Step 6: Final answer
   x = 1,780.77