Finding the Fourth Proportional to 22,221.46, 30,666.72 and 12,661.48

Step by Step Solution

1. Step 1: Write the proportion equation
   22,221.46 : 30,666.72 = 12,661.48 : x
2. Step 2: Convert to fraction form
   22,221.46/30,666.72 = 12,661.48/x
3. Step 3: Cross multiply
   22,221.46x = 30,666.72 × 12,661.48
4. Step 4: Simplify right side
   22,221.46x = 388,286,061.95
5. Step 5: Solve for x
   x = 388,286,061.95/22,221.46
6. Step 6: Final answer
   x = 17,473.47