Finding the Fourth Proportional to 2,279.46, 3,144.74 and 1,393.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.46 : 3,144.74 = 1,393.72 : x
2. Step 2: Convert to fraction form
   2,279.46/3,144.74 = 1,393.72/x
3. Step 3: Cross multiply
   2,279.46x = 3,144.74 × 1,393.72
4. Step 4: Simplify right side
   2,279.46x = 4,382,887.03
5. Step 5: Solve for x
   x = 4,382,887.03/2,279.46
6. Step 6: Final answer
   x = 1,922.77