Finding the Fourth Proportional to 2,068.40, 3,103.14 and 1,081.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,068.40 : 3,103.14 = 1,081.28 : x
2. Step 2: Convert to fraction form
   2,068.40/3,103.14 = 1,081.28/x
3. Step 3: Cross multiply
   2,068.40x = 3,103.14 × 1,081.28
4. Step 4: Simplify right side
   2,068.40x = 3,355,363.22
5. Step 5: Solve for x
   x = 3,355,363.22/2,068.40
6. Step 6: Final answer
   x = 1,622.20