Finding the Fourth Proportional to 2,688.46, 3,709.53 and 1,569.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,688.46 : 3,709.53 = 1,569.31 : x
2. Step 2: Convert to fraction form
   2,688.46/3,709.53 = 1,569.31/x
3. Step 3: Cross multiply
   2,688.46x = 3,709.53 × 1,569.31
4. Step 4: Simplify right side
   2,688.46x = 5,821,393.25
5. Step 5: Solve for x
   x = 5,821,393.25/2,688.46
6. Step 6: Final answer
   x = 2,165.33