Finding the Fourth Proportional to 22,238.57, 30,688.97 and 12,166.89

Step by Step Solution

1. Step 1: Write the proportion equation
   22,238.57 : 30,688.97 = 12,166.89 : x
2. Step 2: Convert to fraction form
   22,238.57/30,688.97 = 12,166.89/x
3. Step 3: Cross multiply
   22,238.57x = 30,688.97 × 12,166.89
4. Step 4: Simplify right side
   22,238.57x = 373,389,322.20
5. Step 5: Solve for x
   x = 373,389,322.20/22,238.57
6. Step 6: Final answer
   x = 16,790.17