Finding the Fourth Proportional to 2,624.49, 3,934 and 1,391.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,624.49 : 3,934 = 1,391.57 : x
2. Step 2: Convert to fraction form
   2,624.49/3,934 = 1,391.57/x
3. Step 3: Cross multiply
   2,624.49x = 3,934 × 1,391.57
4. Step 4: Simplify right side
   2,624.49x = 5,474,436.38
5. Step 5: Solve for x
   x = 5,474,436.38/2,624.49
6. Step 6: Final answer
   x = 2,085.90