Finding the Fourth Proportional to 1,012.17, 1,397.57 and 996.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.17 : 1,397.57 = 996.03 : x
2. Step 2: Convert to fraction form
   1,012.17/1,397.57 = 996.03/x
3. Step 3: Cross multiply
   1,012.17x = 1,397.57 × 996.03
4. Step 4: Simplify right side
   1,012.17x = 1,392,016.67
5. Step 5: Solve for x
   x = 1,392,016.67/1,012.17
6. Step 6: Final answer
   x = 1,375.28