Finding the Fourth Proportional to 2,223.68, 3,335.56 and 1,128.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,223.68 : 3,335.56 = 1,128.56 : x
2. Step 2: Convert to fraction form
   2,223.68/3,335.56 = 1,128.56/x
3. Step 3: Cross multiply
   2,223.68x = 3,335.56 × 1,128.56
4. Step 4: Simplify right side
   2,223.68x = 3,764,379.59
5. Step 5: Solve for x
   x = 3,764,379.59/2,223.68
6. Step 6: Final answer
   x = 1,692.86