Finding the Fourth Proportional to 2,391.45, 3,300.21 and 1,396.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.45 : 3,300.21 = 1,396.71 : x
2. Step 2: Convert to fraction form
   2,391.45/3,300.21 = 1,396.71/x
3. Step 3: Cross multiply
   2,391.45x = 3,300.21 × 1,396.71
4. Step 4: Simplify right side
   2,391.45x = 4,609,436.31
5. Step 5: Solve for x
   x = 4,609,436.31/2,391.45
6. Step 6: Final answer
   x = 1,927.47