Finding the Fourth Proportional to 1,227.72, 1,694.16 and 696.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,227.72 : 1,694.16 = 696.54 : x
2. Step 2: Convert to fraction form
   1,227.72/1,694.16 = 696.54/x
3. Step 3: Cross multiply
   1,227.72x = 1,694.16 × 696.54
4. Step 4: Simplify right side
   1,227.72x = 1,180,050.21
5. Step 5: Solve for x
   x = 1,180,050.21/1,227.72
6. Step 6: Final answer
   x = 961.17