Finding the Fourth Proportional to 1,016.10, 1,383.39 and 1,012.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.10 : 1,383.39 = 1,012.95 : x
2. Step 2: Convert to fraction form
   1,016.10/1,383.39 = 1,012.95/x
3. Step 3: Cross multiply
   1,016.10x = 1,383.39 × 1,012.95
4. Step 4: Simplify right side
   1,016.10x = 1,401,304.90
5. Step 5: Solve for x
   x = 1,401,304.90/1,016.10
6. Step 6: Final answer
   x = 1,379.10