Finding the Fourth Proportional to 1,791.79, 2,688.69 and 696.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,791.79 : 2,688.69 = 696.23 : x
2. Step 2: Convert to fraction form
   1,791.79/2,688.69 = 696.23/x
3. Step 3: Cross multiply
   1,791.79x = 2,688.69 × 696.23
4. Step 4: Simplify right side
   1,791.79x = 1,871,945.89
5. Step 5: Solve for x
   x = 1,871,945.89/1,791.79
6. Step 6: Final answer
   x = 1,044.74