Finding the Fourth Proportional to 2,112.05, 3,168.05 and 725.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.05 : 3,168.05 = 725.37 : x
2. Step 2: Convert to fraction form
   2,112.05/3,168.05 = 725.37/x
3. Step 3: Cross multiply
   2,112.05x = 3,168.05 × 725.37
4. Step 4: Simplify right side
   2,112.05x = 2,298,004.80
5. Step 5: Solve for x
   x = 2,298,004.80/2,112.05
6. Step 6: Final answer
   x = 1,088.05