Finding the Fourth Proportional to 1,256.55, 1,734.03 and 697.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,256.55 : 1,734.03 = 697.02 : x
2. Step 2: Convert to fraction form
   1,256.55/1,734.03 = 697.02/x
3. Step 3: Cross multiply
   1,256.55x = 1,734.03 × 697.02
4. Step 4: Simplify right side
   1,256.55x = 1,208,653.59
5. Step 5: Solve for x
   x = 1,208,653.59/1,256.55
6. Step 6: Final answer
   x = 961.88