Finding the Fourth Proportional to 11,081.21, 16,618.34 and 3,181.59

Step by Step Solution

1. Step 1: Write the proportion equation
   11,081.21 : 16,618.34 = 3,181.59 : x
2. Step 2: Convert to fraction form
   11,081.21/16,618.34 = 3,181.59/x
3. Step 3: Cross multiply
   11,081.21x = 16,618.34 × 3,181.59
4. Step 4: Simplify right side
   11,081.21x = 52,872,728.45
5. Step 5: Solve for x
   x = 52,872,728.45/11,081.21
6. Step 6: Final answer
   x = 4,771.39