Finding the Fourth Proportional to 2,019.86, 2,787.38 and 1,135.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,019.86 : 2,787.38 = 1,135.68 : x
2. Step 2: Convert to fraction form
   2,019.86/2,787.38 = 1,135.68/x
3. Step 3: Cross multiply
   2,019.86x = 2,787.38 × 1,135.68
4. Step 4: Simplify right side
   2,019.86x = 3,165,571.72
5. Step 5: Solve for x
   x = 3,165,571.72/2,019.86
6. Step 6: Final answer
   x = 1,567.22