Finding the Fourth Proportional to 7,289.72, 10,059.83 and 4,145.91

Step by Step Solution

1. Step 1: Write the proportion equation
   7,289.72 : 10,059.83 = 4,145.91 : x
2. Step 2: Convert to fraction form
   7,289.72/10,059.83 = 4,145.91/x
3. Step 3: Cross multiply
   7,289.72x = 10,059.83 × 4,145.91
4. Step 4: Simplify right side
   7,289.72x = 41,707,149.80
5. Step 5: Solve for x
   x = 41,707,149.80/7,289.72
6. Step 6: Final answer
   x = 5,721.37