Finding the Fourth Proportional to 2,689.55, 3,711.39 and 1,510.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,689.55 : 3,711.39 = 1,510.80 : x
2. Step 2: Convert to fraction form
   2,689.55/3,711.39 = 1,510.80/x
3. Step 3: Cross multiply
   2,689.55x = 3,711.39 × 1,510.80
4. Step 4: Simplify right side
   2,689.55x = 5,607,182.05
5. Step 5: Solve for x
   x = 5,607,182.05/2,689.55
6. Step 6: Final answer
   x = 2,084.80