Find a fourth proportional to the numbers 2,5,4.

Explanation

To find the fourth proportional to the numbers 2, 5, and 4, we can follow these steps:

### Step-by-Step Solution:

1. **Define the Fourth Proportional**:
Let the fourth proportional be \( x \). Therefore, we have the numbers 2, 5, 4, and \( x \).

2. **Set Up the Proportionality**:
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