Finding the Fourth Proportional to 1,141.09, 1,714.23 and 812.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.09 : 1,714.23 = 812.83 : x
2. Step 2: Convert to fraction form
   1,141.09/1,714.23 = 812.83/x
3. Step 3: Cross multiply
   1,141.09x = 1,714.23 × 812.83
4. Step 4: Simplify right side
   1,141.09x = 1,393,377.57
5. Step 5: Solve for x
   x = 1,393,377.57/1,141.09
6. Step 6: Final answer
   x = 1,221.09