Finding the Fourth Proportional to 2,228.56, 3,075.30 and 1,284.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,228.56 : 3,075.30 = 1,284.50 : x
2. Step 2: Convert to fraction form
   2,228.56/3,075.30 = 1,284.50/x
3. Step 3: Cross multiply
   2,228.56x = 3,075.30 × 1,284.50
4. Step 4: Simplify right side
   2,228.56x = 3,950,222.85
5. Step 5: Solve for x
   x = 3,950,222.85/2,228.56
6. Step 6: Final answer
   x = 1,772.54