Finding the Fourth Proportional to 2,145.54, 3,220.35 and 1,106.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.54 : 3,220.35 = 1,106.27 : x
2. Step 2: Convert to fraction form
   2,145.54/3,220.35 = 1,106.27/x
3. Step 3: Cross multiply
   2,145.54x = 3,220.35 × 1,106.27
4. Step 4: Simplify right side
   2,145.54x = 3,562,568.42
5. Step 5: Solve for x
   x = 3,562,568.42/2,145.54
6. Step 6: Final answer
   x = 1,660.45