Finding the Fourth Proportional to 1,243.24, 1,715.82 and 712.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243.24 : 1,715.82 = 712.18 : x
2. Step 2: Convert to fraction form
   1,243.24/1,715.82 = 712.18/x
3. Step 3: Cross multiply
   1,243.24x = 1,715.82 × 712.18
4. Step 4: Simplify right side
   1,243.24x = 1,221,972.69
5. Step 5: Solve for x
   x = 1,221,972.69/1,243.24
6. Step 6: Final answer
   x = 982.89