Finding the Fourth Proportional to 21,227.32, 29,306.82 and 13,676.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,227.32 : 29,306.82 = 13,676.32 : x
2. Step 2: Convert to fraction form
   21,227.32/29,306.82 = 13,676.32/x
3. Step 3: Cross multiply
   21,227.32x = 29,306.82 × 13,676.32
4. Step 4: Simplify right side
   21,227.32x = 400,809,448.50
5. Step 5: Solve for x
   x = 400,809,448.50/21,227.32
6. Step 6: Final answer
   x = 18,881.77