Finding the Fourth Proportional to 1,253.47, 1,729.80 and 694.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,253.47 : 1,729.80 = 694.05 : x
2. Step 2: Convert to fraction form
   1,253.47/1,729.80 = 694.05/x
3. Step 3: Cross multiply
   1,253.47x = 1,729.80 × 694.05
4. Step 4: Simplify right side
   1,253.47x = 1,200,567.69
5. Step 5: Solve for x
   x = 1,200,567.69/1,253.47
6. Step 6: Final answer
   x = 957.80