Finding the Fourth Proportional to 1,407.22, 1,942.04 and 817.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.22 : 1,942.04 = 817.94 : x
2. Step 2: Convert to fraction form
   1,407.22/1,942.04 = 817.94/x
3. Step 3: Cross multiply
   1,407.22x = 1,942.04 × 817.94
4. Step 4: Simplify right side
   1,407.22x = 1,588,472.20
5. Step 5: Solve for x
   x = 1,588,472.20/1,407.22
6. Step 6: Final answer
   x = 1,128.80