Finding the Fourth Proportional to 2,686.91, 3,707.78 and 1,567.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,686.91 : 3,707.78 = 1,567.89 : x
2. Step 2: Convert to fraction form
   2,686.91/3,707.78 = 1,567.89/x
3. Step 3: Cross multiply
   2,686.91x = 3,707.78 × 1,567.89
4. Step 4: Simplify right side
   2,686.91x = 5,813,383.34
5. Step 5: Solve for x
   x = 5,813,383.34/2,686.91
6. Step 6: Final answer
   x = 2,163.60