Finding the Fourth Proportional to 2,012.58, 2,777.22 and 1,128.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.58 : 2,777.22 = 1,128.27 : x
2. Step 2: Convert to fraction form
   2,012.58/2,777.22 = 1,128.27/x
3. Step 3: Cross multiply
   2,012.58x = 2,777.22 × 1,128.27
4. Step 4: Simplify right side
   2,012.58x = 3,133,454.01
5. Step 5: Solve for x
   x = 3,133,454.01/2,012.58
6. Step 6: Final answer
   x = 1,556.93