Finding the Fourth Proportional to 1,052.15, 1,452 and 789.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,052.15 : 1,452 = 789.71 : x
2. Step 2: Convert to fraction form
   1,052.15/1,452 = 789.71/x
3. Step 3: Cross multiply
   1,052.15x = 1,452 × 789.71
4. Step 4: Simplify right side
   1,052.15x = 1,146,658.92
5. Step 5: Solve for x
   x = 1,146,658.92/1,052.15
6. Step 6: Final answer
   x = 1,089.82