Finding the Fourth Proportional to 882.83, 1,215.69 and 789.54

Step by Step Solution

1. Step 1: Write the proportion equation
   882.83 : 1,215.69 = 789.54 : x
2. Step 2: Convert to fraction form
   882.83/1,215.69 = 789.54/x
3. Step 3: Cross multiply
   882.83x = 1,215.69 × 789.54
4. Step 4: Simplify right side
   882.83x = 959,835.88
5. Step 5: Solve for x
   x = 959,835.88/882.83
6. Step 6: Final answer
   x = 1,087.23