Finding the Fourth Proportional to 10,851.69, 16,278.09 and 3,456.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,851.69 : 16,278.09 = 3,456.72 : x
2. Step 2: Convert to fraction form
   10,851.69/16,278.09 = 3,456.72/x
3. Step 3: Cross multiply
   10,851.69x = 16,278.09 × 3,456.72
4. Step 4: Simplify right side
   10,851.69x = 56,268,799.26
5. Step 5: Solve for x
   x = 56,268,799.26/10,851.69
6. Step 6: Final answer
   x = 5,185.26