Finding the Fourth Proportional to 2,391.29, 3,300.39 and 1,396.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.29 : 3,300.39 = 1,396.69 : x
2. Step 2: Convert to fraction form
   2,391.29/3,300.39 = 1,396.69/x
3. Step 3: Cross multiply
   2,391.29x = 3,300.39 × 1,396.69
4. Step 4: Simplify right side
   2,391.29x = 4,609,605.21
5. Step 5: Solve for x
   x = 4,609,605.21/2,391.29
6. Step 6: Final answer
   x = 1,927.66