Finding the Fourth Proportional to 1,091.81, 1,505.85 and 796.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,091.81 : 1,505.85 = 796.97 : x
2. Step 2: Convert to fraction form
   1,091.81/1,505.85 = 796.97/x
3. Step 3: Cross multiply
   1,091.81x = 1,505.85 × 796.97
4. Step 4: Simplify right side
   1,091.81x = 1,200,117.27
5. Step 5: Solve for x
   x = 1,200,117.27/1,091.81
6. Step 6: Final answer
   x = 1,099.20