Finding the Fourth Proportional to 3,914.64, 5,401.08 and 2,587.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,914.64 : 5,401.08 = 2,587.86 : x
2. Step 2: Convert to fraction form
   3,914.64/5,401.08 = 2,587.86/x
3. Step 3: Cross multiply
   3,914.64x = 5,401.08 × 2,587.86
4. Step 4: Simplify right side
   3,914.64x = 13,977,238.89
5. Step 5: Solve for x
   x = 13,977,238.89/3,914.64
6. Step 6: Final answer
   x = 3,570.50