Finding the Fourth Proportional to 2,284.57, 3,152.91 and 1,290.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,284.57 : 3,152.91 = 1,290.09 : x
2. Step 2: Convert to fraction form
   2,284.57/3,152.91 = 1,290.09/x
3. Step 3: Cross multiply
   2,284.57x = 3,152.91 × 1,290.09
4. Step 4: Simplify right side
   2,284.57x = 4,067,526.55
5. Step 5: Solve for x
   x = 4,067,526.55/2,284.57
6. Step 6: Final answer
   x = 1,780.44