Finding the Fourth Proportional to 2,279.16, 3,144.96 and 1,284.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.16 : 3,144.96 = 1,284.48 : x
2. Step 2: Convert to fraction form
   2,279.16/3,144.96 = 1,284.48/x
3. Step 3: Cross multiply
   2,279.16x = 3,144.96 × 1,284.48
4. Step 4: Simplify right side
   2,279.16x = 4,039,638.22
5. Step 5: Solve for x
   x = 4,039,638.22/2,279.16
6. Step 6: Final answer
   x = 1,772.42