Finding the Fourth Proportional to 11,786.87, 17,676.52 and 3,887.61

Step by Step Solution

1. Step 1: Write the proportion equation
   11,786.87 : 17,676.52 = 3,887.61 : x
2. Step 2: Convert to fraction form
   11,786.87/17,676.52 = 3,887.61/x
3. Step 3: Cross multiply
   11,786.87x = 17,676.52 × 3,887.61
4. Step 4: Simplify right side
   11,786.87x = 68,719,308.10
5. Step 5: Solve for x
   x = 68,719,308.10/11,786.87
6. Step 6: Final answer
   x = 5,830.16