Finding the Fourth Proportional to 1,243.48, 1,715.89 and 683.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243.48 : 1,715.89 = 683.94 : x
2. Step 2: Convert to fraction form
   1,243.48/1,715.89 = 683.94/x
3. Step 3: Cross multiply
   1,243.48x = 1,715.89 × 683.94
4. Step 4: Simplify right side
   1,243.48x = 1,173,564.10
5. Step 5: Solve for x
   x = 1,173,564.10/1,243.48
6. Step 6: Final answer
   x = 943.78