Finding the Fourth Proportional to 21,748.35, 30,014.83 and 12,189.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,748.35 : 30,014.83 = 12,189.86 : x
2. Step 2: Convert to fraction form
   21,748.35/30,014.83 = 12,189.86/x
3. Step 3: Cross multiply
   21,748.35x = 30,014.83 × 12,189.86
4. Step 4: Simplify right side
   21,748.35x = 365,876,425.55
5. Step 5: Solve for x
   x = 365,876,425.55/21,748.35
6. Step 6: Final answer
   x = 16,823.18