Finding the Fourth Proportional to 2,148.81, 3,222.27 and 1,109.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,148.81 : 3,222.27 = 1,109.40 : x
2. Step 2: Convert to fraction form
   2,148.81/3,222.27 = 1,109.40/x
3. Step 3: Cross multiply
   2,148.81x = 3,222.27 × 1,109.40
4. Step 4: Simplify right side
   2,148.81x = 3,574,786.34
5. Step 5: Solve for x
   x = 3,574,786.34/2,148.81
6. Step 6: Final answer
   x = 1,663.61