Finding the Fourth Proportional to 2,228.25, 3,075.57 and 1,284.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,228.25 : 3,075.57 = 1,284.15 : x
2. Step 2: Convert to fraction form
   2,228.25/3,075.57 = 1,284.15/x
3. Step 3: Cross multiply
   2,228.25x = 3,075.57 × 1,284.15
4. Step 4: Simplify right side
   2,228.25x = 3,949,493.22
5. Step 5: Solve for x
   x = 3,949,493.22/2,228.25
6. Step 6: Final answer
   x = 1,772.46