Finding the Fourth Proportional to 2,072.24, 2,859.62 and 1,128.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.24 : 2,859.62 = 1,128.05 : x
2. Step 2: Convert to fraction form
   2,072.24/2,859.62 = 1,128.05/x
3. Step 3: Cross multiply
   2,072.24x = 2,859.62 × 1,128.05
4. Step 4: Simplify right side
   2,072.24x = 3,225,794.34
5. Step 5: Solve for x
   x = 3,225,794.34/2,072.24
6. Step 6: Final answer
   x = 1,556.67