Finding the Fourth Proportional to 2,587.72, 3,885.90 and 2,567.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,587.72 : 3,885.90 = 2,567.56 : x
2. Step 2: Convert to fraction form
   2,587.72/3,885.90 = 2,567.56/x
3. Step 3: Cross multiply
   2,587.72x = 3,885.90 × 2,567.56
4. Step 4: Simplify right side
   2,587.72x = 9,977,281.40
5. Step 5: Solve for x
   x = 9,977,281.40/2,587.72
6. Step 6: Final answer
   x = 3,855.63