Finding the Fourth Proportional to 2,510.79, 3,464.91 and 1,391.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,510.79 : 3,464.91 = 1,391.80 : x
2. Step 2: Convert to fraction form
   2,510.79/3,464.91 = 1,391.80/x
3. Step 3: Cross multiply
   2,510.79x = 3,464.91 × 1,391.80
4. Step 4: Simplify right side
   2,510.79x = 4,822,461.74
5. Step 5: Solve for x
   x = 4,822,461.74/2,510.79
6. Step 6: Final answer
   x = 1,920.69