Finding the Fourth Proportional to 2,279.32, 3,419.16 and 818.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.32 : 3,419.16 = 818.47 : x
2. Step 2: Convert to fraction form
   2,279.32/3,419.16 = 818.47/x
3. Step 3: Cross multiply
   2,279.32x = 3,419.16 × 818.47
4. Step 4: Simplify right side
   2,279.32x = 2,798,479.89
5. Step 5: Solve for x
   x = 2,798,479.89/2,279.32
6. Step 6: Final answer
   x = 1,227.77