Finding the Fourth Proportional to 2,665.79, 3,997.81 and 1,105.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.79 : 3,997.81 = 1,105.88 : x
2. Step 2: Convert to fraction form
   2,665.79/3,997.81 = 1,105.88/x
3. Step 3: Cross multiply
   2,665.79x = 3,997.81 × 1,105.88
4. Step 4: Simplify right side
   2,665.79x = 4,421,084.54
5. Step 5: Solve for x
   x = 4,421,084.54/2,665.79
6. Step 6: Final answer
   x = 1,658.45