Finding the Fourth Proportional to 11,081.21, 16,621.96 and 3,685.67

Step by Step Solution

1. Step 1: Write the proportion equation
   11,081.21 : 16,621.96 = 3,685.67 : x
2. Step 2: Convert to fraction form
   11,081.21/16,621.96 = 3,685.67/x
3. Step 3: Cross multiply
   11,081.21x = 16,621.96 × 3,685.67
4. Step 4: Simplify right side
   11,081.21x = 61,262,957.78
5. Step 5: Solve for x
   x = 61,262,957.78/11,081.21
6. Step 6: Final answer
   x = 5,528.55