Finding the Fourth Proportional to 21,972.72, 30,327.76 and 12,546.74

Step by Step Solution

1. Step 1: Write the proportion equation
   21,972.72 : 30,327.76 = 12,546.74 : x
2. Step 2: Convert to fraction form
   21,972.72/30,327.76 = 12,546.74/x
3. Step 3: Cross multiply
   21,972.72x = 30,327.76 × 12,546.74
4. Step 4: Simplify right side
   21,972.72x = 380,514,519.50
5. Step 5: Solve for x
   x = 380,514,519.50/21,972.72
6. Step 6: Final answer
   x = 17,317.59