Finding the Fourth Proportional to 21,513.72, 29,664.96 and 13,950.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,513.72 : 29,664.96 = 13,950.12 : x
2. Step 2: Convert to fraction form
   21,513.72/29,664.96 = 13,950.12/x
3. Step 3: Cross multiply
   21,513.72x = 29,664.96 × 13,950.12
4. Step 4: Simplify right side
   21,513.72x = 413,829,751.80
5. Step 5: Solve for x
   x = 413,829,751.80/21,513.72
6. Step 6: Final answer
   x = 19,235.62