Finding the Fourth Proportional to 2,228.67, 3,075.72 and 1,284.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,228.67 : 3,075.72 = 1,284.63 : x
2. Step 2: Convert to fraction form
   2,228.67/3,075.72 = 1,284.63/x
3. Step 3: Cross multiply
   2,228.67x = 3,075.72 × 1,284.63
4. Step 4: Simplify right side
   2,228.67x = 3,951,162.18
5. Step 5: Solve for x
   x = 3,951,162.18/2,228.67
6. Step 6: Final answer
   x = 1,772.88