Finding the Fourth Proportional to 2,019.89, 2,787.35 and 1,135.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,019.89 : 2,787.35 = 1,135.67 : x
2. Step 2: Convert to fraction form
   2,019.89/2,787.35 = 1,135.67/x
3. Step 3: Cross multiply
   2,019.89x = 2,787.35 × 1,135.67
4. Step 4: Simplify right side
   2,019.89x = 3,165,490.16
5. Step 5: Solve for x
   x = 3,165,490.16/2,019.89
6. Step 6: Final answer
   x = 1,567.16