Finding the Fourth Proportional to 2,279.32, 3,145.48 and 1,284.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.32 : 3,145.48 = 1,284.62 : x
2. Step 2: Convert to fraction form
   2,279.32/3,145.48 = 1,284.62/x
3. Step 3: Cross multiply
   2,279.32x = 3,145.48 × 1,284.62
4. Step 4: Simplify right side
   2,279.32x = 4,040,746.52
5. Step 5: Solve for x
   x = 4,040,746.52/2,279.32
6. Step 6: Final answer
   x = 1,772.79