Finding the Fourth Proportional to 1,128.96, 1,694.51 and 581.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128.96 : 1,694.51 = 581.52 : x
2. Step 2: Convert to fraction form
   1,128.96/1,694.51 = 581.52/x
3. Step 3: Cross multiply
   1,128.96x = 1,694.51 × 581.52
4. Step 4: Simplify right side
   1,128.96x = 985,391.46
5. Step 5: Solve for x
   x = 985,391.46/1,128.96
6. Step 6: Final answer
   x = 872.83