Finding the Fourth Proportional to 22,155.42, 30,577.37 and 12,724.05

Step by Step Solution

1. Step 1: Write the proportion equation
   22,155.42 : 30,577.37 = 12,724.05 : x
2. Step 2: Convert to fraction form
   22,155.42/30,577.37 = 12,724.05/x
3. Step 3: Cross multiply
   22,155.42x = 30,577.37 × 12,724.05
4. Step 4: Simplify right side
   22,155.42x = 389,067,921.13
5. Step 5: Solve for x
   x = 389,067,921.13/22,155.42
6. Step 6: Final answer
   x = 17,560.85