Finding the Fourth Proportional to 1,227.34, 1,693.57 and 696.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,227.34 : 1,693.57 = 696.28 : x
2. Step 2: Convert to fraction form
   1,227.34/1,693.57 = 696.28/x
3. Step 3: Cross multiply
   1,227.34x = 1,693.57 × 696.28
4. Step 4: Simplify right side
   1,227.34x = 1,179,198.92
5. Step 5: Solve for x
   x = 1,179,198.92/1,227.34
6. Step 6: Final answer
   x = 960.78