Finding the Fourth Proportional to 1,227.66, 1,693.98 and 696.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,227.66 : 1,693.98 = 696.58 : x
2. Step 2: Convert to fraction form
   1,227.66/1,693.98 = 696.58/x
3. Step 3: Cross multiply
   1,227.66x = 1,693.98 × 696.58
4. Step 4: Simplify right side
   1,227.66x = 1,179,992.59
5. Step 5: Solve for x
   x = 1,179,992.59/1,227.66
6. Step 6: Final answer
   x = 961.17