Finding the Fourth Proportional to 1,228.85, 1,695.82 and 697.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,228.85 : 1,695.82 = 697.69 : x
2. Step 2: Convert to fraction form
   1,228.85/1,695.82 = 697.69/x
3. Step 3: Cross multiply
   1,228.85x = 1,695.82 × 697.69
4. Step 4: Simplify right side
   1,228.85x = 1,183,156.51
5. Step 5: Solve for x
   x = 1,183,156.51/1,228.85
6. Step 6: Final answer
   x = 962.82