Finding the Fourth Proportional to 22,159.50, 30,577.71 and 12,729.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,159.50 : 30,577.71 = 12,729.42 : x
2. Step 2: Convert to fraction form
   22,159.50/30,577.71 = 12,729.42/x
3. Step 3: Cross multiply
   22,159.50x = 30,577.71 × 12,729.42
4. Step 4: Simplify right side
   22,159.50x = 389,236,513.23
5. Step 5: Solve for x
   x = 389,236,513.23/22,159.50
6. Step 6: Final answer
   x = 17,565.22