Finding the Fourth Proportional to 1,182.44, 1,631.34 and 789.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,182.44 : 1,631.34 = 789.72 : x
2. Step 2: Convert to fraction form
   1,182.44/1,631.34 = 789.72/x
3. Step 3: Cross multiply
   1,182.44x = 1,631.34 × 789.72
4. Step 4: Simplify right side
   1,182.44x = 1,288,301.82
5. Step 5: Solve for x
   x = 1,288,301.82/1,182.44
6. Step 6: Final answer
   x = 1,089.53