Finding the Fourth Proportional to 21,538.38, 29,715.62 and 13,466.51

Step by Step Solution

1. Step 1: Write the proportion equation
   21,538.38 : 29,715.62 = 13,466.51 : x
2. Step 2: Convert to fraction form
   21,538.38/29,715.62 = 13,466.51/x
3. Step 3: Cross multiply
   21,538.38x = 29,715.62 × 13,466.51
4. Step 4: Simplify right side
   21,538.38x = 400,165,477.98
5. Step 5: Solve for x
   x = 400,165,477.98/21,538.38
6. Step 6: Final answer
   x = 18,579.18