Finding the Fourth Proportional to 2,151.72, 3,223.53 and 1,330.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.72 : 3,223.53 = 1,330.38 : x
2. Step 2: Convert to fraction form
   2,151.72/3,223.53 = 1,330.38/x
3. Step 3: Cross multiply
   2,151.72x = 3,223.53 × 1,330.38
4. Step 4: Simplify right side
   2,151.72x = 4,288,519.84
5. Step 5: Solve for x
   x = 4,288,519.84/2,151.72
6. Step 6: Final answer
   x = 1,993.07