Finding the Fourth Proportional to 2,019.36, 2,784.96 and 1,320

Step by Step Solution

1. Step 1: Write the proportion equation
   2,019.36 : 2,784.96 = 1,320 : x
2. Step 2: Convert to fraction form
   2,019.36/2,784.96 = 1,320/x
3. Step 3: Cross multiply
   2,019.36x = 2,784.96 × 1,320
4. Step 4: Simplify right side
   2,019.36x = 3,676,147.20
5. Step 5: Solve for x
   x = 3,676,147.20/2,019.36
6. Step 6: Final answer
   x = 1,820.45