Finding the Fourth Proportional to 3,880.25, 5,354.70 and 2,111.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,880.25 : 5,354.70 = 2,111.83 : x
2. Step 2: Convert to fraction form
   3,880.25/5,354.70 = 2,111.83/x
3. Step 3: Cross multiply
   3,880.25x = 5,354.70 × 2,111.83
4. Step 4: Simplify right side
   3,880.25x = 11,308,216.10
5. Step 5: Solve for x
   x = 11,308,216.10/3,880.25
6. Step 6: Final answer
   x = 2,914.30