Finding the Fourth Proportional to 2,019.25, 2,786.57 and 1,320.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,019.25 : 2,786.57 = 1,320.63 : x
2. Step 2: Convert to fraction form
   2,019.25/2,786.57 = 1,320.63/x
3. Step 3: Cross multiply
   2,019.25x = 2,786.57 × 1,320.63
4. Step 4: Simplify right side
   2,019.25x = 3,680,027.94
5. Step 5: Solve for x
   x = 3,680,027.94/2,019.25
6. Step 6: Final answer
   x = 1,822.47