Finding the Fourth Proportional to 21,495.36, 29,667.60 and 13,532.16

Step by Step Solution

1. Step 1: Write the proportion equation
   21,495.36 : 29,667.60 = 13,532.16 : x
2. Step 2: Convert to fraction form
   21,495.36/29,667.60 = 13,532.16/x
3. Step 3: Cross multiply
   21,495.36x = 29,667.60 × 13,532.16
4. Step 4: Simplify right side
   21,495.36x = 401,466,710.02
5. Step 5: Solve for x
   x = 401,466,710.02/21,495.36
6. Step 6: Final answer
   x = 18,676.90