Finding the Fourth Proportional to 3,864.56, 5,327.79 and 2,587.94

Step by Step Solution

1. Step 1: Write the proportion equation
   3,864.56 : 5,327.79 = 2,587.94 : x
2. Step 2: Convert to fraction form
   3,864.56/5,327.79 = 2,587.94/x
3. Step 3: Cross multiply
   3,864.56x = 5,327.79 × 2,587.94
4. Step 4: Simplify right side
   3,864.56x = 13,788,000.85
5. Step 5: Solve for x
   x = 13,788,000.85/3,864.56
6. Step 6: Final answer
   x = 3,567.81