Finding the Fourth Proportional to 2,391.05, 3,300 and 1,721.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.05 : 3,300 = 1,721.07 : x
2. Step 2: Convert to fraction form
   2,391.05/3,300 = 1,721.07/x
3. Step 3: Cross multiply
   2,391.05x = 3,300 × 1,721.07
4. Step 4: Simplify right side
   2,391.05x = 5,679,514.50
5. Step 5: Solve for x
   x = 5,679,514.50/2,391.05
6. Step 6: Final answer
   x = 2,375.33