Finding the Fourth Proportional to 2,007.69, 2,770.56 and 1,123.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.69 : 2,770.56 = 1,123.71 : x
2. Step 2: Convert to fraction form
   2,007.69/2,770.56 = 1,123.71/x
3. Step 3: Cross multiply
   2,007.69x = 2,770.56 × 1,123.71
4. Step 4: Simplify right side
   2,007.69x = 3,113,305.98
5. Step 5: Solve for x
   x = 3,113,305.98/2,007.69
6. Step 6: Final answer
   x = 1,550.69