Finding the Fourth Proportional to 1,434.10, 2,149.55 and 818.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.10 : 2,149.55 = 818.10 : x
2. Step 2: Convert to fraction form
   1,434.10/2,149.55 = 818.10/x
3. Step 3: Cross multiply
   1,434.10x = 2,149.55 × 818.10
4. Step 4: Simplify right side
   1,434.10x = 1,758,546.86
5. Step 5: Solve for x
   x = 1,758,546.86/1,434.10
6. Step 6: Final answer
   x = 1,226.24