Finding the Fourth Proportional to 2,223.57, 3,337.44 and 1,128.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,223.57 : 3,337.44 = 1,128.72 : x
2. Step 2: Convert to fraction form
   2,223.57/3,337.44 = 1,128.72/x
3. Step 3: Cross multiply
   2,223.57x = 3,337.44 × 1,128.72
4. Step 4: Simplify right side
   2,223.57x = 3,767,035.28
5. Step 5: Solve for x
   x = 3,767,035.28/2,223.57
6. Step 6: Final answer
   x = 1,694.14