Finding the Fourth Proportional to 2,012.77, 2,777.57 and 1,128.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.77 : 2,777.57 = 1,128.63 : x
2. Step 2: Convert to fraction form
   2,012.77/2,777.57 = 1,128.63/x
3. Step 3: Cross multiply
   2,012.77x = 2,777.57 × 1,128.63
4. Step 4: Simplify right side
   2,012.77x = 3,134,848.83
5. Step 5: Solve for x
   x = 3,134,848.83/2,012.77
6. Step 6: Final answer
   x = 1,557.48