Finding the Fourth Proportional to 2,279.14, 3,145.16 and 1,284.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.14 : 3,145.16 = 1,284.50 : x
2. Step 2: Convert to fraction form
   2,279.14/3,145.16 = 1,284.50/x
3. Step 3: Cross multiply
   2,279.14x = 3,145.16 × 1,284.50
4. Step 4: Simplify right side
   2,279.14x = 4,039,958.02
5. Step 5: Solve for x
   x = 4,039,958.02/2,279.14
6. Step 6: Final answer
   x = 1,772.58