Finding the Fourth Proportional to 10,851.89, 16,279.85 and 3,458.21

Step by Step Solution

1. Step 1: Write the proportion equation
   10,851.89 : 16,279.85 = 3,458.21 : x
2. Step 2: Convert to fraction form
   10,851.89/16,279.85 = 3,458.21/x
3. Step 3: Cross multiply
   10,851.89x = 16,279.85 × 3,458.21
4. Step 4: Simplify right side
   10,851.89x = 56,299,067.31
5. Step 5: Solve for x
   x = 56,299,067.31/10,851.89
6. Step 6: Final answer
   x = 5,187.95