Finding the Fourth Proportional to 2,689.72, 3,711.75 and 1,570.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,689.72 : 3,711.75 = 1,570.75 : x
2. Step 2: Convert to fraction form
   2,689.72/3,711.75 = 1,570.75/x
3. Step 3: Cross multiply
   2,689.72x = 3,711.75 × 1,570.75
4. Step 4: Simplify right side
   2,689.72x = 5,830,231.31
5. Step 5: Solve for x
   x = 5,830,231.31/2,689.72
6. Step 6: Final answer
   x = 2,167.60