Finding the Fourth Proportional to 2,012.52, 2,777.24 and 1,128.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.52 : 2,777.24 = 1,128.28 : x
2. Step 2: Convert to fraction form
   2,012.52/2,777.24 = 1,128.28/x
3. Step 3: Cross multiply
   2,012.52x = 2,777.24 × 1,128.28
4. Step 4: Simplify right side
   2,012.52x = 3,133,504.35
5. Step 5: Solve for x
   x = 3,133,504.35/2,012.52
6. Step 6: Final answer
   x = 1,557.01