Finding the Fourth Proportional to 2,279.57, 3,145.74 and 1,284.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.57 : 3,145.74 = 1,284.83 : x
2. Step 2: Convert to fraction form
   2,279.57/3,145.74 = 1,284.83/x
3. Step 3: Cross multiply
   2,279.57x = 3,145.74 × 1,284.83
4. Step 4: Simplify right side
   2,279.57x = 4,041,725.40
5. Step 5: Solve for x
   x = 4,041,725.40/2,279.57
6. Step 6: Final answer
   x = 1,773.02