Finding the Fourth Proportional to 1,407.75, 1,942.52 and 818.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.75 : 1,942.52 = 818.07 : x
2. Step 2: Convert to fraction form
   1,407.75/1,942.52 = 818.07/x
3. Step 3: Cross multiply
   1,407.75x = 1,942.52 × 818.07
4. Step 4: Simplify right side
   1,407.75x = 1,589,113.25
5. Step 5: Solve for x
   x = 1,589,113.25/1,407.75
6. Step 6: Final answer
   x = 1,128.83