Finding the Fourth Proportional to 11,185.56, 16,774.20 and 3,687.21

Step by Step Solution

1. Step 1: Write the proportion equation
   11,185.56 : 16,774.20 = 3,687.21 : x
2. Step 2: Convert to fraction form
   11,185.56/16,774.20 = 3,687.21/x
3. Step 3: Cross multiply
   11,185.56x = 16,774.20 × 3,687.21
4. Step 4: Simplify right side
   11,185.56x = 61,849,997.98
5. Step 5: Solve for x
   x = 61,849,997.98/11,185.56
6. Step 6: Final answer
   x = 5,529.45