Finding the Fourth Proportional to 1,142.91, 1,576.94 and 789.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,142.91 : 1,576.94 = 789.14 : x
2. Step 2: Convert to fraction form
   1,142.91/1,576.94 = 789.14/x
3. Step 3: Cross multiply
   1,142.91x = 1,576.94 × 789.14
4. Step 4: Simplify right side
   1,142.91x = 1,244,426.43
5. Step 5: Solve for x
   x = 1,244,426.43/1,142.91
6. Step 6: Final answer
   x = 1,088.82