Finding the Fourth Proportional to 21,424.50, 29,565.81 and 13,041

Step by Step Solution

1. Step 1: Write the proportion equation
   21,424.50 : 29,565.81 = 13,041 : x
2. Step 2: Convert to fraction form
   21,424.50/29,565.81 = 13,041/x
3. Step 3: Cross multiply
   21,424.50x = 29,565.81 × 13,041
4. Step 4: Simplify right side
   21,424.50x = 385,567,728.21
5. Step 5: Solve for x
   x = 385,567,728.21/21,424.50
6. Step 6: Final answer
   x = 17,996.58