Finding the Fourth Proportional to 3,172.72, 4,757.82 and 1,223.68

Step by Step Solution

1. Step 1: Write the proportion equation
   3,172.72 : 4,757.82 = 1,223.68 : x
2. Step 2: Convert to fraction form
   3,172.72/4,757.82 = 1,223.68/x
3. Step 3: Cross multiply
   3,172.72x = 4,757.82 × 1,223.68
4. Step 4: Simplify right side
   3,172.72x = 5,822,049.18
5. Step 5: Solve for x
   x = 5,822,049.18/3,172.72
6. Step 6: Final answer
   x = 1,835.03