Finding the Fourth Proportional to 2,590.72, 3,578.88 and 2,461.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,590.72 : 3,578.88 = 2,461.12 : x
2. Step 2: Convert to fraction form
   2,590.72/3,578.88 = 2,461.12/x
3. Step 3: Cross multiply
   2,590.72x = 3,578.88 × 2,461.12
4. Step 4: Simplify right side
   2,590.72x = 8,808,053.15
5. Step 5: Solve for x
   x = 8,808,053.15/2,590.72
6. Step 6: Final answer
   x = 3,399.85