Finding the Fourth Proportional to 2,012.48, 2,777.33 and 1,128.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.48 : 2,777.33 = 1,128.23 : x
2. Step 2: Convert to fraction form
   2,012.48/2,777.33 = 1,128.23/x
3. Step 3: Cross multiply
   2,012.48x = 2,777.33 × 1,128.23
4. Step 4: Simplify right side
   2,012.48x = 3,133,461.38
5. Step 5: Solve for x
   x = 3,133,461.38/2,012.48
6. Step 6: Final answer
   x = 1,557.01