Finding the Fourth Proportional to 22,218.55, 30,663.50 and 12,661.36

Step by Step Solution

1. Step 1: Write the proportion equation
   22,218.55 : 30,663.50 = 12,661.36 : x
2. Step 2: Convert to fraction form
   22,218.55/30,663.50 = 12,661.36/x
3. Step 3: Cross multiply
   22,218.55x = 30,663.50 × 12,661.36
4. Step 4: Simplify right side
   22,218.55x = 388,241,472.39
5. Step 5: Solve for x
   x = 388,241,472.39/22,218.55
6. Step 6: Final answer
   x = 17,473.76