Finding the Fourth Proportional to 2,012.16, 2,776.98 and 1,128.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.16 : 2,776.98 = 1,128.12 : x
2. Step 2: Convert to fraction form
   2,012.16/2,776.98 = 1,128.12/x
3. Step 3: Cross multiply
   2,012.16x = 2,776.98 × 1,128.12
4. Step 4: Simplify right side
   2,012.16x = 3,132,766.68
5. Step 5: Solve for x
   x = 3,132,766.68/2,012.16
6. Step 6: Final answer
   x = 1,556.92