Finding the Fourth Proportional to 2,510.85, 3,464.89 and 1,391.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,510.85 : 3,464.89 = 1,391.90 : x
2. Step 2: Convert to fraction form
   2,510.85/3,464.89 = 1,391.90/x
3. Step 3: Cross multiply
   2,510.85x = 3,464.89 × 1,391.90
4. Step 4: Simplify right side
   2,510.85x = 4,822,759.59
5. Step 5: Solve for x
   x = 4,822,759.59/2,510.85
6. Step 6: Final answer
   x = 1,920.76