Finding the Fourth Proportional to 21,441.81, 29,586.88 and 12,367.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,441.81 : 29,586.88 = 12,367.50 : x
2. Step 2: Convert to fraction form
   21,441.81/29,586.88 = 12,367.50/x
3. Step 3: Cross multiply
   21,441.81x = 29,586.88 × 12,367.50
4. Step 4: Simplify right side
   21,441.81x = 365,915,738.40
5. Step 5: Solve for x
   x = 365,915,738.40/21,441.81
6. Step 6: Final answer
   x = 17,065.52