Finding the Fourth Proportional to 2,109.80, 3,167.04 and 1,244.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.80 : 3,167.04 = 1,244.72 : x
2. Step 2: Convert to fraction form
   2,109.80/3,167.04 = 1,244.72/x
3. Step 3: Cross multiply
   2,109.80x = 3,167.04 × 1,244.72
4. Step 4: Simplify right side
   2,109.80x = 3,942,078.03
5. Step 5: Solve for x
   x = 3,942,078.03/2,109.80
6. Step 6: Final answer
   x = 1,868.46