Finding the Fourth Proportional to 2,019.72, 2,786.94 and 1,135.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,019.72 : 2,786.94 = 1,135.38 : x
2. Step 2: Convert to fraction form
   2,019.72/2,786.94 = 1,135.38/x
3. Step 3: Cross multiply
   2,019.72x = 2,786.94 × 1,135.38
4. Step 4: Simplify right side
   2,019.72x = 3,164,235.94
5. Step 5: Solve for x
   x = 3,164,235.94/2,019.72
6. Step 6: Final answer
   x = 1,566.67