Finding the Fourth Proportional to 2,072.24, 2,859.69 and 1,128.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.24 : 2,859.69 = 1,128.03 : x
2. Step 2: Convert to fraction form
   2,072.24/2,859.69 = 1,128.03/x
3. Step 3: Cross multiply
   2,072.24x = 2,859.69 × 1,128.03
4. Step 4: Simplify right side
   2,072.24x = 3,225,816.11
5. Step 5: Solve for x
   x = 3,225,816.11/2,072.24
6. Step 6: Final answer
   x = 1,556.68