Finding the Fourth Proportional to 2,279.52, 3,145.68 and 1,284.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.52 : 3,145.68 = 1,284.78 : x
2. Step 2: Convert to fraction form
   2,279.52/3,145.68 = 1,284.78/x
3. Step 3: Cross multiply
   2,279.52x = 3,145.68 × 1,284.78
4. Step 4: Simplify right side
   2,279.52x = 4,041,506.75
5. Step 5: Solve for x
   x = 4,041,506.75/2,279.52
6. Step 6: Final answer
   x = 1,772.96