Finding the Fourth Proportional to 1,407.83, 1,942.02 and 818.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.83 : 1,942.02 = 818.24 : x
2. Step 2: Convert to fraction form
   1,407.83/1,942.02 = 818.24/x
3. Step 3: Cross multiply
   1,407.83x = 1,942.02 × 818.24
4. Step 4: Simplify right side
   1,407.83x = 1,589,028.73
5. Step 5: Solve for x
   x = 1,589,028.73/1,407.83
6. Step 6: Final answer
   x = 1,128.71