Finding the Fourth Proportional to 2,019.76, 2,787.42 and 1,135.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,019.76 : 2,787.42 = 1,135.60 : x
2. Step 2: Convert to fraction form
   2,019.76/2,787.42 = 1,135.60/x
3. Step 3: Cross multiply
   2,019.76x = 2,787.42 × 1,135.60
4. Step 4: Simplify right side
   2,019.76x = 3,165,394.15
5. Step 5: Solve for x
   x = 3,165,394.15/2,019.76
6. Step 6: Final answer
   x = 1,567.21