Finding the Fourth Proportional to 1,172.82, 1,760.68 and 1,112.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,172.82 : 1,760.68 = 1,112.34 : x
2. Step 2: Convert to fraction form
   1,172.82/1,760.68 = 1,112.34/x
3. Step 3: Cross multiply
   1,172.82x = 1,760.68 × 1,112.34
4. Step 4: Simplify right side
   1,172.82x = 1,958,474.79
5. Step 5: Solve for x
   x = 1,958,474.79/1,172.82
6. Step 6: Final answer
   x = 1,669.89