Finding the Fourth Proportional to 1,131.28, 1,697.56 and 883.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.28 : 1,697.56 = 883.79 : x
2. Step 2: Convert to fraction form
   1,131.28/1,697.56 = 883.79/x
3. Step 3: Cross multiply
   1,131.28x = 1,697.56 × 883.79
4. Step 4: Simplify right side
   1,131.28x = 1,500,295.39
5. Step 5: Solve for x
   x = 1,500,295.39/1,131.28
6. Step 6: Final answer
   x = 1,326.19