Finding the Fourth Proportional to 1,443.26, 1,992.72 and 1,259.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.26 : 1,992.72 = 1,259.19 : x
2. Step 2: Convert to fraction form
   1,443.26/1,992.72 = 1,259.19/x
3. Step 3: Cross multiply
   1,443.26x = 1,992.72 × 1,259.19
4. Step 4: Simplify right side
   1,443.26x = 2,509,213.10
5. Step 5: Solve for x
   x = 2,509,213.10/1,443.26
6. Step 6: Final answer
   x = 1,738.58