Finding the Fourth Proportional to 3,188.55, 4,389.27 and 2,766.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,188.55 : 4,389.27 = 2,766.42 : x
2. Step 2: Convert to fraction form
   3,188.55/4,389.27 = 2,766.42/x
3. Step 3: Cross multiply
   3,188.55x = 4,389.27 × 2,766.42
4. Step 4: Simplify right side
   3,188.55x = 12,142,564.31
5. Step 5: Solve for x
   x = 12,142,564.31/3,188.55
6. Step 6: Final answer
   x = 3,808.18