Finding the Fourth Proportional to 21,942.50, 30,281.41 and 12,006.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,942.50 : 30,281.41 = 12,006.50 : x
2. Step 2: Convert to fraction form
   21,942.50/30,281.41 = 12,006.50/x
3. Step 3: Cross multiply
   21,942.50x = 30,281.41 × 12,006.50
4. Step 4: Simplify right side
   21,942.50x = 363,573,749.17
5. Step 5: Solve for x
   x = 363,573,749.17/21,942.50
6. Step 6: Final answer
   x = 16,569.39