Finding the Fourth Proportional to 2,109.80, 3,168.30 and 1,382.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.80 : 3,168.30 = 1,382.60 : x
2. Step 2: Convert to fraction form
   2,109.80/3,168.30 = 1,382.60/x
3. Step 3: Cross multiply
   2,109.80x = 3,168.30 × 1,382.60
4. Step 4: Simplify right side
   2,109.80x = 4,380,491.58
5. Step 5: Solve for x
   x = 4,380,491.58/2,109.80
6. Step 6: Final answer
   x = 2,076.26