Finding the Fourth Proportional to 1,162.62, 1,603.83 and 789.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.62 : 1,603.83 = 789.72 : x
2. Step 2: Convert to fraction form
   1,162.62/1,603.83 = 789.72/x
3. Step 3: Cross multiply
   1,162.62x = 1,603.83 × 789.72
4. Step 4: Simplify right side
   1,162.62x = 1,266,576.63
5. Step 5: Solve for x
   x = 1,266,576.63/1,162.62
6. Step 6: Final answer
   x = 1,089.42