Finding the Fourth Proportional to 2,228.71, 3,075.94 and 1,284.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,228.71 : 3,075.94 = 1,284.32 : x
2. Step 2: Convert to fraction form
   2,228.71/3,075.94 = 1,284.32/x
3. Step 3: Cross multiply
   2,228.71x = 3,075.94 × 1,284.32
4. Step 4: Simplify right side
   2,228.71x = 3,950,469.46
5. Step 5: Solve for x
   x = 3,950,469.46/2,228.71
6. Step 6: Final answer
   x = 1,772.54