Finding the Fourth Proportional to 10,805.06, 16,185.72 and 8,331.32

Step by Step Solution

1. Step 1: Write the proportion equation
   10,805.06 : 16,185.72 = 8,331.32 : x
2. Step 2: Convert to fraction form
   10,805.06/16,185.72 = 8,331.32/x
3. Step 3: Cross multiply
   10,805.06x = 16,185.72 × 8,331.32
4. Step 4: Simplify right side
   10,805.06x = 134,848,412.75
5. Step 5: Solve for x
   x = 134,848,412.75/10,805.06
6. Step 6: Final answer
   x = 12,480.12