Finding the Fourth Proportional to 21,545.91, 29,732.72 and 13,053.06

Step by Step Solution

1. Step 1: Write the proportion equation
   21,545.91 : 29,732.72 = 13,053.06 : x
2. Step 2: Convert to fraction form
   21,545.91/29,732.72 = 13,053.06/x
3. Step 3: Cross multiply
   21,545.91x = 29,732.72 × 13,053.06
4. Step 4: Simplify right side
   21,545.91x = 388,102,912.86
5. Step 5: Solve for x
   x = 388,102,912.86/21,545.91
6. Step 6: Final answer
   x = 18,012.83