Finding the Fourth Proportional to 21,144.39, 29,165.98 and 13,600.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,144.39 : 29,165.98 = 13,600.52 : x
2. Step 2: Convert to fraction form
   21,144.39/29,165.98 = 13,600.52/x
3. Step 3: Cross multiply
   21,144.39x = 29,165.98 × 13,600.52
4. Step 4: Simplify right side
   21,144.39x = 396,672,426.31
5. Step 5: Solve for x
   x = 396,672,426.31/21,144.39
6. Step 6: Final answer
   x = 18,760.17