Finding the Fourth Proportional to 13,399.83, 18,491.49 and 7,430.54

Step by Step Solution

1. Step 1: Write the proportion equation
   13,399.83 : 18,491.49 = 7,430.54 : x
2. Step 2: Convert to fraction form
   13,399.83/18,491.49 = 7,430.54/x
3. Step 3: Cross multiply
   13,399.83x = 18,491.49 × 7,430.54
4. Step 4: Simplify right side
   13,399.83x = 137,401,663.65
5. Step 5: Solve for x
   x = 137,401,663.65/13,399.83
6. Step 6: Final answer
   x = 10,253.99