Finding the Fourth Proportional to 2,284.95, 3,153.21 and 1,290.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,284.95 : 3,153.21 = 1,290.27 : x
2. Step 2: Convert to fraction form
   2,284.95/3,153.21 = 1,290.27/x
3. Step 3: Cross multiply
   2,284.95x = 3,153.21 × 1,290.27
4. Step 4: Simplify right side
   2,284.95x = 4,068,485.82
5. Step 5: Solve for x
   x = 4,068,485.82/2,284.95
6. Step 6: Final answer
   x = 1,780.56