Finding the Fourth Proportional to 2,019.60, 2,786.83 and 1,135.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,019.60 : 2,786.83 = 1,135.39 : x
2. Step 2: Convert to fraction form
   2,019.60/2,786.83 = 1,135.39/x
3. Step 3: Cross multiply
   2,019.60x = 2,786.83 × 1,135.39
4. Step 4: Simplify right side
   2,019.60x = 3,164,138.91
5. Step 5: Solve for x
   x = 3,164,138.91/2,019.60
6. Step 6: Final answer
   x = 1,566.72