Finding the Fourth Proportional to 2,007.60, 2,770.46 and 1,123.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.60 : 2,770.46 = 1,123.40 : x
2. Step 2: Convert to fraction form
   2,007.60/2,770.46 = 1,123.40/x
3. Step 3: Cross multiply
   2,007.60x = 2,770.46 × 1,123.40
4. Step 4: Simplify right side
   2,007.60x = 3,112,334.76
5. Step 5: Solve for x
   x = 3,112,334.76/2,007.60
6. Step 6: Final answer
   x = 1,550.28