Finding the Fourth Proportional to 1,081.48, 1,622.72 and 789.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.48 : 1,622.72 = 789.24 : x
2. Step 2: Convert to fraction form
   1,081.48/1,622.72 = 789.24/x
3. Step 3: Cross multiply
   1,081.48x = 1,622.72 × 789.24
4. Step 4: Simplify right side
   1,081.48x = 1,280,715.53
5. Step 5: Solve for x
   x = 1,280,715.53/1,081.48
6. Step 6: Final answer
   x = 1,184.22