Finding the Fourth Proportional to 1,256.56, 1,734.04 and 697.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,256.56 : 1,734.04 = 697.02 : x
2. Step 2: Convert to fraction form
   1,256.56/1,734.04 = 697.02/x
3. Step 3: Cross multiply
   1,256.56x = 1,734.04 × 697.02
4. Step 4: Simplify right side
   1,256.56x = 1,208,660.56
5. Step 5: Solve for x
   x = 1,208,660.56/1,256.56
6. Step 6: Final answer
   x = 961.88