Finding the Fourth Proportional to 21,601.50, 29,810.61 and 13,104.06

Step by Step Solution

1. Step 1: Write the proportion equation
   21,601.50 : 29,810.61 = 13,104.06 : x
2. Step 2: Convert to fraction form
   21,601.50/29,810.61 = 13,104.06/x
3. Step 3: Cross multiply
   21,601.50x = 29,810.61 × 13,104.06
4. Step 4: Simplify right side
   21,601.50x = 390,640,022.08
5. Step 5: Solve for x
   x = 390,640,022.08/21,601.50
6. Step 6: Final answer
   x = 18,083.93