Finding the Fourth Proportional to 21,803.76, 30,089.50 and 12,245.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,803.76 : 30,089.50 = 12,245.72 : x
2. Step 2: Convert to fraction form
   21,803.76/30,089.50 = 12,245.72/x
3. Step 3: Cross multiply
   21,803.76x = 30,089.50 × 12,245.72
4. Step 4: Simplify right side
   21,803.76x = 368,467,441.49
5. Step 5: Solve for x
   x = 368,467,441.49/21,803.76
6. Step 6: Final answer
   x = 16,899.27