Finding the Fourth Proportional to 2,234.72, 3,083.65 and 1,290.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,234.72 : 3,083.65 = 1,290.51 : x
2. Step 2: Convert to fraction form
   2,234.72/3,083.65 = 1,290.51/x
3. Step 3: Cross multiply
   2,234.72x = 3,083.65 × 1,290.51
4. Step 4: Simplify right side
   2,234.72x = 3,979,477.94
5. Step 5: Solve for x
   x = 3,979,477.94/2,234.72
6. Step 6: Final answer
   x = 1,780.75