Finding the Fourth Proportional to 2,279.39, 3,145.53 and 1,335.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.39 : 3,145.53 = 1,335.35 : x
2. Step 2: Convert to fraction form
   2,279.39/3,145.53 = 1,335.35/x
3. Step 3: Cross multiply
   2,279.39x = 3,145.53 × 1,335.35
4. Step 4: Simplify right side
   2,279.39x = 4,200,367.76
5. Step 5: Solve for x
   x = 4,200,367.76/2,279.39
6. Step 6: Final answer
   x = 1,842.76