Finding the Fourth Proportional to 2,112.02, 3,168.47 and 725.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.02 : 3,168.47 = 725.03 : x
2. Step 2: Convert to fraction form
   2,112.02/3,168.47 = 725.03/x
3. Step 3: Cross multiply
   2,112.02x = 3,168.47 × 725.03
4. Step 4: Simplify right side
   2,112.02x = 2,297,216.34
5. Step 5: Solve for x
   x = 2,297,216.34/2,112.02
6. Step 6: Final answer
   x = 1,087.69