Finding the Fourth Proportional to 2,379.60, 3,565.46 and 818.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,379.60 : 3,565.46 = 818.76 : x
2. Step 2: Convert to fraction form
   2,379.60/3,565.46 = 818.76/x
3. Step 3: Cross multiply
   2,379.60x = 3,565.46 × 818.76
4. Step 4: Simplify right side
   2,379.60x = 2,919,256.03
5. Step 5: Solve for x
   x = 2,919,256.03/2,379.60
6. Step 6: Final answer
   x = 1,226.78