Finding the Fourth Proportional to 2,689.76, 3,711.52 and 1,569.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,689.76 : 3,711.52 = 1,569.89 : x
2. Step 2: Convert to fraction form
   2,689.76/3,711.52 = 1,569.89/x
3. Step 3: Cross multiply
   2,689.76x = 3,711.52 × 1,569.89
4. Step 4: Simplify right side
   2,689.76x = 5,826,659.58
5. Step 5: Solve for x
   x = 5,826,659.58/2,689.76
6. Step 6: Final answer
   x = 2,166.24