Finding the Fourth Proportional to 21,554.48, 29,735.76 and 13,166

Step by Step Solution

1. Step 1: Write the proportion equation
   21,554.48 : 29,735.76 = 13,166 : x
2. Step 2: Convert to fraction form
   21,554.48/29,735.76 = 13,166/x
3. Step 3: Cross multiply
   21,554.48x = 29,735.76 × 13,166
4. Step 4: Simplify right side
   21,554.48x = 391,501,016.16
5. Step 5: Solve for x
   x = 391,501,016.16/21,554.48
6. Step 6: Final answer
   x = 18,163.32