Finding the Fourth Proportional to 1,162.49, 1,740.89 and 1,120.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.49 : 1,740.89 = 1,120.57 : x
2. Step 2: Convert to fraction form
   1,162.49/1,740.89 = 1,120.57/x
3. Step 3: Cross multiply
   1,162.49x = 1,740.89 × 1,120.57
4. Step 4: Simplify right side
   1,162.49x = 1,950,787.56
5. Step 5: Solve for x
   x = 1,950,787.56/1,162.49
6. Step 6: Final answer
   x = 1,678.12