Finding the Fourth Proportional to 2,140.36, 3,204.72 and 1,112.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,140.36 : 3,204.72 = 1,112.20 : x
2. Step 2: Convert to fraction form
   2,140.36/3,204.72 = 1,112.20/x
3. Step 3: Cross multiply
   2,140.36x = 3,204.72 × 1,112.20
4. Step 4: Simplify right side
   2,140.36x = 3,564,289.58
5. Step 5: Solve for x
   x = 3,564,289.58/2,140.36
6. Step 6: Final answer
   x = 1,665.28