Finding the Fourth Proportional to 21,535.09, 29,724.30 and 13,981.03

Step by Step Solution

1. Step 1: Write the proportion equation
   21,535.09 : 29,724.30 = 13,981.03 : x
2. Step 2: Convert to fraction form
   21,535.09/29,724.30 = 13,981.03/x
3. Step 3: Cross multiply
   21,535.09x = 29,724.30 × 13,981.03
4. Step 4: Simplify right side
   21,535.09x = 415,576,111.50
5. Step 5: Solve for x
   x = 415,576,111.50/21,535.09
6. Step 6: Final answer
   x = 19,297.63