Finding the Fourth Proportional to 2,007.72, 2,770.65 and 1,123.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.72 : 2,770.65 = 1,123.47 : x
2. Step 2: Convert to fraction form
   2,007.72/2,770.65 = 1,123.47/x
3. Step 3: Cross multiply
   2,007.72x = 2,770.65 × 1,123.47
4. Step 4: Simplify right side
   2,007.72x = 3,112,742.16
5. Step 5: Solve for x
   x = 3,112,742.16/2,007.72
6. Step 6: Final answer
   x = 1,550.39