Finding the Fourth Proportional to 1,256.72, 1,734.38 and 697.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,256.72 : 1,734.38 = 697.24 : x
2. Step 2: Convert to fraction form
   1,256.72/1,734.38 = 697.24/x
3. Step 3: Cross multiply
   1,256.72x = 1,734.38 × 697.24
4. Step 4: Simplify right side
   1,256.72x = 1,209,275.63
5. Step 5: Solve for x
   x = 1,209,275.63/1,256.72
6. Step 6: Final answer
   x = 962.25