Finding the Fourth Proportional to 2,012.63, 2,777.37 and 1,128.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.63 : 2,777.37 = 1,128.47 : x
2. Step 2: Convert to fraction form
   2,012.63/2,777.37 = 1,128.47/x
3. Step 3: Cross multiply
   2,012.63x = 2,777.37 × 1,128.47
4. Step 4: Simplify right side
   2,012.63x = 3,134,178.72
5. Step 5: Solve for x
   x = 3,134,178.72/2,012.63
6. Step 6: Final answer
   x = 1,557.26