Finding the Fourth Proportional to 21,995.50, 30,353.80 and 12,059.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,995.50 : 30,353.80 = 12,059.50 : x
2. Step 2: Convert to fraction form
   21,995.50/30,353.80 = 12,059.50/x
3. Step 3: Cross multiply
   21,995.50x = 30,353.80 × 12,059.50
4. Step 4: Simplify right side
   21,995.50x = 366,051,651.10
5. Step 5: Solve for x
   x = 366,051,651.10/21,995.50
6. Step 6: Final answer
   x = 16,642.12