Finding the Fourth Proportional to 1,142.56, 1,576.83 and 955.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,142.56 : 1,576.83 = 955.72 : x
2. Step 2: Convert to fraction form
   1,142.56/1,576.83 = 955.72/x
3. Step 3: Cross multiply
   1,142.56x = 1,576.83 × 955.72
4. Step 4: Simplify right side
   1,142.56x = 1,507,007.97
5. Step 5: Solve for x
   x = 1,507,007.97/1,142.56
6. Step 6: Final answer
   x = 1,318.97