Finding the Fourth Proportional to 21,906.72, 30,245.40 and 19,544.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,906.72 : 30,245.40 = 19,544.76 : x
2. Step 2: Convert to fraction form
   21,906.72/30,245.40 = 19,544.76/x
3. Step 3: Cross multiply
   21,906.72x = 30,245.40 × 19,544.76
4. Step 4: Simplify right side
   21,906.72x = 591,139,084.10
5. Step 5: Solve for x
   x = 591,139,084.10/21,906.72
6. Step 6: Final answer
   x = 26,984.37