Finding the Fourth Proportional to 1,182.18, 1,632.12 and 789.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,182.18 : 1,632.12 = 789.86 : x
2. Step 2: Convert to fraction form
   1,182.18/1,632.12 = 789.86/x
3. Step 3: Cross multiply
   1,182.18x = 1,632.12 × 789.86
4. Step 4: Simplify right side
   1,182.18x = 1,289,146.30
5. Step 5: Solve for x
   x = 1,289,146.30/1,182.18
6. Step 6: Final answer
   x = 1,090.48