Finding the Fourth Proportional to 1,182.16, 1,631.72 and 789.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,182.16 : 1,631.72 = 789.04 : x
2. Step 2: Convert to fraction form
   1,182.16/1,631.72 = 789.04/x
3. Step 3: Cross multiply
   1,182.16x = 1,631.72 × 789.04
4. Step 4: Simplify right side
   1,182.16x = 1,287,492.35
5. Step 5: Solve for x
   x = 1,287,492.35/1,182.16
6. Step 6: Final answer
   x = 1,089.10