Finding the Fourth Proportional to 2,012.41, 2,777.18 and 1,128.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.41 : 2,777.18 = 1,128.20 : x
2. Step 2: Convert to fraction form
   2,012.41/2,777.18 = 1,128.20/x
3. Step 3: Cross multiply
   2,012.41x = 2,777.18 × 1,128.20
4. Step 4: Simplify right side
   2,012.41x = 3,133,194.95
5. Step 5: Solve for x
   x = 3,133,194.95/2,012.41
6. Step 6: Final answer
   x = 1,556.94