Finding the Fourth Proportional to 1,243.25, 1,715.69 and 683.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243.25 : 1,715.69 = 683.72 : x
2. Step 2: Convert to fraction form
   1,243.25/1,715.69 = 683.72/x
3. Step 3: Cross multiply
   1,243.25x = 1,715.69 × 683.72
4. Step 4: Simplify right side
   1,243.25x = 1,173,052.44
5. Step 5: Solve for x
   x = 1,173,052.44/1,243.25
6. Step 6: Final answer
   x = 943.54