Finding the Fourth Proportional to 851.73, 1,168.50 and 810.42

Step by Step Solution

1. Step 1: Write the proportion equation
   851.73 : 1,168.50 = 810.42 : x
2. Step 2: Convert to fraction form
   851.73/1,168.50 = 810.42/x
3. Step 3: Cross multiply
   851.73x = 1,168.50 × 810.42
4. Step 4: Simplify right side
   851.73x = 946,975.77
5. Step 5: Solve for x
   x = 946,975.77/851.73
6. Step 6: Final answer
   x = 1,111.83