Finding the Fourth Proportional to 1,243.83, 1,716.50 and 712.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243.83 : 1,716.50 = 712.73 : x
2. Step 2: Convert to fraction form
   1,243.83/1,716.50 = 712.73/x
3. Step 3: Cross multiply
   1,243.83x = 1,716.50 × 712.73
4. Step 4: Simplify right side
   1,243.83x = 1,223,405.34
5. Step 5: Solve for x
   x = 1,223,405.34/1,243.83
6. Step 6: Final answer
   x = 983.58