Finding the Fourth Proportional to 1,519.72, 2,281.55 and 789.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,519.72 : 2,281.55 = 789.81 : x
2. Step 2: Convert to fraction form
   1,519.72/2,281.55 = 789.81/x
3. Step 3: Cross multiply
   1,519.72x = 2,281.55 × 789.81
4. Step 4: Simplify right side
   1,519.72x = 1,801,975.65
5. Step 5: Solve for x
   x = 1,801,975.65/1,519.72
6. Step 6: Final answer
   x = 1,185.73