Finding the Fourth Proportional to 2,279.71, 3,145.98 and 1,284.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.71 : 3,145.98 = 1,284.94 : x
2. Step 2: Convert to fraction form
   2,279.71/3,145.98 = 1,284.94/x
3. Step 3: Cross multiply
   2,279.71x = 3,145.98 × 1,284.94
4. Step 4: Simplify right side
   2,279.71x = 4,042,395.54
5. Step 5: Solve for x
   x = 4,042,395.54/2,279.71
6. Step 6: Final answer
   x = 1,773.21