Finding the Fourth Proportional to 2,019.59, 2,786.34 and 1,135.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,019.59 : 2,786.34 = 1,135.20 : x
2. Step 2: Convert to fraction form
   2,019.59/2,786.34 = 1,135.20/x
3. Step 3: Cross multiply
   2,019.59x = 2,786.34 × 1,135.20
4. Step 4: Simplify right side
   2,019.59x = 3,163,053.17
5. Step 5: Solve for x
   x = 3,163,053.17/2,019.59
6. Step 6: Final answer
   x = 1,566.19