Finding the Fourth Proportional to 2,019.83, 2,787.31 and 1,135.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,019.83 : 2,787.31 = 1,135.61 : x
2. Step 2: Convert to fraction form
   2,019.83/2,787.31 = 1,135.61/x
3. Step 3: Cross multiply
   2,019.83x = 2,787.31 × 1,135.61
4. Step 4: Simplify right side
   2,019.83x = 3,165,297.11
5. Step 5: Solve for x
   x = 3,165,297.11/2,019.83
6. Step 6: Final answer
   x = 1,567.11