Finding the Fourth Proportional to 2,689.29, 3,711.42 and 1,570.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,689.29 : 3,711.42 = 1,570.05 : x
2. Step 2: Convert to fraction form
   2,689.29/3,711.42 = 1,570.05/x
3. Step 3: Cross multiply
   2,689.29x = 3,711.42 × 1,570.05
4. Step 4: Simplify right side
   2,689.29x = 5,827,114.97
5. Step 5: Solve for x
   x = 5,827,114.97/2,689.29
6. Step 6: Final answer
   x = 2,166.79