Finding the Fourth Proportional to 2,254.78, 3,105.81 and 1,590.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,254.78 : 3,105.81 = 1,590.47 : x
2. Step 2: Convert to fraction form
   2,254.78/3,105.81 = 1,590.47/x
3. Step 3: Cross multiply
   2,254.78x = 3,105.81 × 1,590.47
4. Step 4: Simplify right side
   2,254.78x = 4,939,682.10
5. Step 5: Solve for x
   x = 4,939,682.10/2,254.78
6. Step 6: Final answer
   x = 2,190.76