Finding the Fourth Proportional to 13,371.81, 18,453.39 and 7,403.89

Step by Step Solution

1. Step 1: Write the proportion equation
   13,371.81 : 18,453.39 = 7,403.89 : x
2. Step 2: Convert to fraction form
   13,371.81/18,453.39 = 7,403.89/x
3. Step 3: Cross multiply
   13,371.81x = 18,453.39 × 7,403.89
4. Step 4: Simplify right side
   13,371.81x = 136,626,869.69
5. Step 5: Solve for x
   x = 136,626,869.69/13,371.81
6. Step 6: Final answer
   x = 10,217.53