Finding the Fourth Proportional to 2,012.73, 2,777.61 and 1,128.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.73 : 2,777.61 = 1,128.52 : x
2. Step 2: Convert to fraction form
   2,012.73/2,777.61 = 1,128.52/x
3. Step 3: Cross multiply
   2,012.73x = 2,777.61 × 1,128.52
4. Step 4: Simplify right side
   2,012.73x = 3,134,588.44
5. Step 5: Solve for x
   x = 3,134,588.44/2,012.73
6. Step 6: Final answer
   x = 1,557.38