Finding the Fourth Proportional to 2,223.42, 3,336.05 and 1,128.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,223.42 : 3,336.05 = 1,128.12 : x
2. Step 2: Convert to fraction form
   2,223.42/3,336.05 = 1,128.12/x
3. Step 3: Cross multiply
   2,223.42x = 3,336.05 × 1,128.12
4. Step 4: Simplify right side
   2,223.42x = 3,763,459.09
5. Step 5: Solve for x
   x = 3,763,459.09/2,223.42
6. Step 6: Final answer
   x = 1,692.64