Finding the Fourth Proportional to 2,007.81, 2,770.65 and 1,123.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.81 : 2,770.65 = 1,123.61 : x
2. Step 2: Convert to fraction form
   2,007.81/2,770.65 = 1,123.61/x
3. Step 3: Cross multiply
   2,007.81x = 2,770.65 × 1,123.61
4. Step 4: Simplify right side
   2,007.81x = 3,113,116.19
5. Step 5: Solve for x
   x = 3,113,116.19/2,007.81
6. Step 6: Final answer
   x = 1,550.50