Finding the Fourth Proportional to 2,019.64, 2,784.86 and 1,272.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,019.64 : 2,784.86 = 1,272.70 : x
2. Step 2: Convert to fraction form
   2,019.64/2,784.86 = 1,272.70/x
3. Step 3: Cross multiply
   2,019.64x = 2,784.86 × 1,272.70
4. Step 4: Simplify right side
   2,019.64x = 3,544,291.32
5. Step 5: Solve for x
   x = 3,544,291.32/2,019.64
6. Step 6: Final answer
   x = 1,754.91