Finding the Fourth Proportional to 1,255.71, 1,732.89 and 696.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,255.71 : 1,732.89 = 696.19 : x
2. Step 2: Convert to fraction form
   1,255.71/1,732.89 = 696.19/x
3. Step 3: Cross multiply
   1,255.71x = 1,732.89 × 696.19
4. Step 4: Simplify right side
   1,255.71x = 1,206,420.69
5. Step 5: Solve for x
   x = 1,206,420.69/1,255.71
6. Step 6: Final answer
   x = 960.75