Finding the Fourth Proportional to 3,880.27, 5,354.67 and 2,111.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,880.27 : 5,354.67 = 2,111.89 : x
2. Step 2: Convert to fraction form
   3,880.27/5,354.67 = 2,111.89/x
3. Step 3: Cross multiply
   3,880.27x = 5,354.67 × 2,111.89
4. Step 4: Simplify right side
   3,880.27x = 11,308,474.03
5. Step 5: Solve for x
   x = 11,308,474.03/3,880.27
6. Step 6: Final answer
   x = 2,914.35