Finding the Fourth Proportional to 20,234.72, 27,919.06 and 12,276.72

Step by Step Solution

1. Step 1: Write the proportion equation
   20,234.72 : 27,919.06 = 12,276.72 : x
2. Step 2: Convert to fraction form
   20,234.72/27,919.06 = 12,276.72/x
3. Step 3: Cross multiply
   20,234.72x = 27,919.06 × 12,276.72
4. Step 4: Simplify right side
   20,234.72x = 342,754,482.28
5. Step 5: Solve for x
   x = 342,754,482.28/20,234.72
6. Step 6: Final answer
   x = 16,938.93