Finding the Fourth Proportional to 2,689.60, 3,711.18 and 1,510.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,689.60 : 3,711.18 = 1,510.72 : x
2. Step 2: Convert to fraction form
   2,689.60/3,711.18 = 1,510.72/x
3. Step 3: Cross multiply
   2,689.60x = 3,711.18 × 1,510.72
4. Step 4: Simplify right side
   2,689.60x = 5,606,553.85
5. Step 5: Solve for x
   x = 5,606,553.85/2,689.60
6. Step 6: Final answer
   x = 2,084.53