Finding the Fourth Proportional to 1,105.11, 1,657.59 and 671.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.11 : 1,657.59 = 671.36 : x
2. Step 2: Convert to fraction form
   1,105.11/1,657.59 = 671.36/x
3. Step 3: Cross multiply
   1,105.11x = 1,657.59 × 671.36
4. Step 4: Simplify right side
   1,105.11x = 1,112,831.33
5. Step 5: Solve for x
   x = 1,112,831.33/1,105.11
6. Step 6: Final answer
   x = 1,006.99