Finding the Fourth Proportional to 21,850.50, 30,153.72 and 11,914.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,850.50 : 30,153.72 = 11,914.50 : x
2. Step 2: Convert to fraction form
   21,850.50/30,153.72 = 11,914.50/x
3. Step 3: Cross multiply
   21,850.50x = 30,153.72 × 11,914.50
4. Step 4: Simplify right side
   21,850.50x = 359,266,496.94
5. Step 5: Solve for x
   x = 359,266,496.94/21,850.50
6. Step 6: Final answer
   x = 16,442.03