Finding the Fourth Proportional to 2,019.59, 3,028.74 and 786.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,019.59 : 3,028.74 = 786.70 : x
2. Step 2: Convert to fraction form
   2,019.59/3,028.74 = 786.70/x
3. Step 3: Cross multiply
   2,019.59x = 3,028.74 × 786.70
4. Step 4: Simplify right side
   2,019.59x = 2,382,709.76
5. Step 5: Solve for x
   x = 2,382,709.76/2,019.59
6. Step 6: Final answer
   x = 1,179.80