Finding the Fourth Proportional to 11,185.86, 16,780.84 and 3,689.86

Step by Step Solution

1. Step 1: Write the proportion equation
   11,185.86 : 16,780.84 = 3,689.86 : x
2. Step 2: Convert to fraction form
   11,185.86/16,780.84 = 3,689.86/x
3. Step 3: Cross multiply
   11,185.86x = 16,780.84 × 3,689.86
4. Step 4: Simplify right side
   11,185.86x = 61,918,950.28
5. Step 5: Solve for x
   x = 61,918,950.28/11,185.86
6. Step 6: Final answer
   x = 5,535.47