Finding the Fourth Proportional to 21,362.41, 29,438.50 and 15,382.79

Step by Step Solution

1. Step 1: Write the proportion equation
   21,362.41 : 29,438.50 = 15,382.79 : x
2. Step 2: Convert to fraction form
   21,362.41/29,438.50 = 15,382.79/x
3. Step 3: Cross multiply
   21,362.41x = 29,438.50 × 15,382.79
4. Step 4: Simplify right side
   21,362.41x = 452,846,039.31
5. Step 5: Solve for x
   x = 452,846,039.31/21,362.41
6. Step 6: Final answer
   x = 21,198.27