Finding the Fourth Proportional to 2,453.50, 3,385.78 and 1,391.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,453.50 : 3,385.78 = 1,391.24 : x
2. Step 2: Convert to fraction form
   2,453.50/3,385.78 = 1,391.24/x
3. Step 3: Cross multiply
   2,453.50x = 3,385.78 × 1,391.24
4. Step 4: Simplify right side
   2,453.50x = 4,710,432.57
5. Step 5: Solve for x
   x = 4,710,432.57/2,453.50
6. Step 6: Final answer
   x = 1,919.88