Finding the Fourth Proportional to 11,086.16, 16,631.62 and 3,188.61

Step by Step Solution

1. Step 1: Write the proportion equation
   11,086.16 : 16,631.62 = 3,188.61 : x
2. Step 2: Convert to fraction form
   11,086.16/16,631.62 = 3,188.61/x
3. Step 3: Cross multiply
   11,086.16x = 16,631.62 × 3,188.61
4. Step 4: Simplify right side
   11,086.16x = 53,031,749.85
5. Step 5: Solve for x
   x = 53,031,749.85/11,086.16
6. Step 6: Final answer
   x = 4,783.60