Finding the Fourth Proportional to 12,212.16, 18,317.89 and 3,892.67

Step by Step Solution

1. Step 1: Write the proportion equation
   12,212.16 : 18,317.89 = 3,892.67 : x
2. Step 2: Convert to fraction form
   12,212.16/18,317.89 = 3,892.67/x
3. Step 3: Cross multiply
   12,212.16x = 18,317.89 × 3,892.67
4. Step 4: Simplify right side
   12,212.16x = 71,305,500.87
5. Step 5: Solve for x
   x = 71,305,500.87/12,212.16
6. Step 6: Final answer
   x = 5,838.89