Finding the Fourth Proportional to 22,221.30, 30,667.29 and 12,664.11

Step by Step Solution

1. Step 1: Write the proportion equation
   22,221.30 : 30,667.29 = 12,664.11 : x
2. Step 2: Convert to fraction form
   22,221.30/30,667.29 = 12,664.11/x
3. Step 3: Cross multiply
   22,221.30x = 30,667.29 × 12,664.11
4. Step 4: Simplify right side
   22,221.30x = 388,373,933.96
5. Step 5: Solve for x
   x = 388,373,933.96/22,221.30
6. Step 6: Final answer
   x = 17,477.55