Finding the Fourth Proportional to 11,081.54, 16,618.47 and 3,181.91

Step by Step Solution

1. Step 1: Write the proportion equation
   11,081.54 : 16,618.47 = 3,181.91 : x
2. Step 2: Convert to fraction form
   11,081.54/16,618.47 = 3,181.91/x
3. Step 3: Cross multiply
   11,081.54x = 16,618.47 × 3,181.91
4. Step 4: Simplify right side
   11,081.54x = 52,878,392.79
5. Step 5: Solve for x
   x = 52,878,392.79/11,081.54
6. Step 6: Final answer
   x = 4,771.76