Finding the Fourth Proportional to 1,253.20, 1,729.32 and 693.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,253.20 : 1,729.32 = 693.69 : x
2. Step 2: Convert to fraction form
   1,253.20/1,729.32 = 693.69/x
3. Step 3: Cross multiply
   1,253.20x = 1,729.32 × 693.69
4. Step 4: Simplify right side
   1,253.20x = 1,199,613.62
5. Step 5: Solve for x
   x = 1,199,613.62/1,253.20
6. Step 6: Final answer
   x = 957.24