Finding the Fourth Proportional to 3,877.89, 5,351.33 and 2,109.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,877.89 : 5,351.33 = 2,109.50 : x
2. Step 2: Convert to fraction form
   3,877.89/5,351.33 = 2,109.50/x
3. Step 3: Cross multiply
   3,877.89x = 5,351.33 × 2,109.50
4. Step 4: Simplify right side
   3,877.89x = 11,288,629.22
5. Step 5: Solve for x
   x = 11,288,629.22/3,877.89
6. Step 6: Final answer
   x = 2,911.02