Finding the Fourth Proportional to 2,689.65, 3,711.78 and 1,510.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,689.65 : 3,711.78 = 1,510.65 : x
2. Step 2: Convert to fraction form
   2,689.65/3,711.78 = 1,510.65/x
3. Step 3: Cross multiply
   2,689.65x = 3,711.78 × 1,510.65
4. Step 4: Simplify right side
   2,689.65x = 5,607,200.46
5. Step 5: Solve for x
   x = 5,607,200.46/2,689.65
6. Step 6: Final answer
   x = 2,084.73