Finding the Fourth Proportional to 2,234.91, 3,083.76 and 1,290.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,234.91 : 3,083.76 = 1,290.42 : x
2. Step 2: Convert to fraction form
   2,234.91/3,083.76 = 1,290.42/x
3. Step 3: Cross multiply
   2,234.91x = 3,083.76 × 1,290.42
4. Step 4: Simplify right side
   2,234.91x = 3,979,345.58
5. Step 5: Solve for x
   x = 3,979,345.58/2,234.91
6. Step 6: Final answer
   x = 1,780.54