Finding the Fourth Proportional to 1,222.01, 1,686.48 and 697.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,222.01 : 1,686.48 = 697.94 : x
2. Step 2: Convert to fraction form
   1,222.01/1,686.48 = 697.94/x
3. Step 3: Cross multiply
   1,222.01x = 1,686.48 × 697.94
4. Step 4: Simplify right side
   1,222.01x = 1,177,061.85
5. Step 5: Solve for x
   x = 1,177,061.85/1,222.01
6. Step 6: Final answer
   x = 963.22