Finding the Fourth Proportional to 1,407.54, 1,942.64 and 818.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.54 : 1,942.64 = 818.42 : x
2. Step 2: Convert to fraction form
   1,407.54/1,942.64 = 818.42/x
3. Step 3: Cross multiply
   1,407.54x = 1,942.64 × 818.42
4. Step 4: Simplify right side
   1,407.54x = 1,589,885.72
5. Step 5: Solve for x
   x = 1,589,885.72/1,407.54
6. Step 6: Final answer
   x = 1,129.55