Finding the Fourth Proportional to 2,279.63, 3,145.91 and 1,284.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.63 : 3,145.91 = 1,284.86 : x
2. Step 2: Convert to fraction form
   2,279.63/3,145.91 = 1,284.86/x
3. Step 3: Cross multiply
   2,279.63x = 3,145.91 × 1,284.86
4. Step 4: Simplify right side
   2,279.63x = 4,042,031.77
5. Step 5: Solve for x
   x = 4,042,031.77/2,279.63
6. Step 6: Final answer
   x = 1,773.11