Finding the Fourth Proportional to 2,567.27, 3,542.83 and 1,388.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,567.27 : 3,542.83 = 1,388.34 : x
2. Step 2: Convert to fraction form
   2,567.27/3,542.83 = 1,388.34/x
3. Step 3: Cross multiply
   2,567.27x = 3,542.83 × 1,388.34
4. Step 4: Simplify right side
   2,567.27x = 4,918,658.89
5. Step 5: Solve for x
   x = 4,918,658.89/2,567.27
6. Step 6: Final answer
   x = 1,915.91