Finding the Fourth Proportional to 1,256.96, 1,734.59 and 697.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,256.96 : 1,734.59 = 697.43 : x
2. Step 2: Convert to fraction form
   1,256.96/1,734.59 = 697.43/x
3. Step 3: Cross multiply
   1,256.96x = 1,734.59 × 697.43
4. Step 4: Simplify right side
   1,256.96x = 1,209,742.94
5. Step 5: Solve for x
   x = 1,209,742.94/1,256.96
6. Step 6: Final answer
   x = 962.44