Finding the Fourth Proportional to 21,600.50, 29,809.24 and 13,103.06

Step by Step Solution

1. Step 1: Write the proportion equation
   21,600.50 : 29,809.24 = 13,103.06 : x
2. Step 2: Convert to fraction form
   21,600.50/29,809.24 = 13,103.06/x
3. Step 3: Cross multiply
   21,600.50x = 29,809.24 × 13,103.06
4. Step 4: Simplify right side
   21,600.50x = 390,592,260.27
5. Step 5: Solve for x
   x = 390,592,260.27/21,600.50
6. Step 6: Final answer
   x = 18,082.56