Finding the Fourth Proportional to 10,853.98, 16,280.79 and 3,458.34

Step by Step Solution

1. Step 1: Write the proportion equation
   10,853.98 : 16,280.79 = 3,458.34 : x
2. Step 2: Convert to fraction form
   10,853.98/16,280.79 = 3,458.34/x
3. Step 3: Cross multiply
   10,853.98x = 16,280.79 × 3,458.34
4. Step 4: Simplify right side
   10,853.98x = 56,304,513.77
5. Step 5: Solve for x
   x = 56,304,513.77/10,853.98
6. Step 6: Final answer
   x = 5,187.45