Finding the Fourth Proportional to 2,297.72, 3,446.72 and 1,128.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,297.72 : 3,446.72 = 1,128.28 : x
2. Step 2: Convert to fraction form
   2,297.72/3,446.72 = 1,128.28/x
3. Step 3: Cross multiply
   2,297.72x = 3,446.72 × 1,128.28
4. Step 4: Simplify right side
   2,297.72x = 3,888,861.68
5. Step 5: Solve for x
   x = 3,888,861.68/2,297.72
6. Step 6: Final answer
   x = 1,692.49