Finding the Fourth Proportional to 1,407.96, 1,942.36 and 818.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.96 : 1,942.36 = 818.18 : x
2. Step 2: Convert to fraction form
   1,407.96/1,942.36 = 818.18/x
3. Step 3: Cross multiply
   1,407.96x = 1,942.36 × 818.18
4. Step 4: Simplify right side
   1,407.96x = 1,589,200.10
5. Step 5: Solve for x
   x = 1,589,200.10/1,407.96
6. Step 6: Final answer
   x = 1,128.73