Finding the Fourth Proportional to 22,376.72, 30,879.25 and 12,305.18

Step by Step Solution

1. Step 1: Write the proportion equation
   22,376.72 : 30,879.25 = 12,305.18 : x
2. Step 2: Convert to fraction form
   22,376.72/30,879.25 = 12,305.18/x
3. Step 3: Cross multiply
   22,376.72x = 30,879.25 × 12,305.18
4. Step 4: Simplify right side
   22,376.72x = 379,974,729.52
5. Step 5: Solve for x
   x = 379,974,729.52/22,376.72
6. Step 6: Final answer
   x = 16,980.81