Finding the Fourth Proportional to 2,279.16, 3,419.49 and 818.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.16 : 3,419.49 = 818.42 : x
2. Step 2: Convert to fraction form
   2,279.16/3,419.49 = 818.42/x
3. Step 3: Cross multiply
   2,279.16x = 3,419.49 × 818.42
4. Step 4: Simplify right side
   2,279.16x = 2,798,579.01
5. Step 5: Solve for x
   x = 2,798,579.01/2,279.16
6. Step 6: Final answer
   x = 1,227.90