Finding the Fourth Proportional to 11,453.69, 15,811.61 and 7,206.81

Step by Step Solution

1. Step 1: Write the proportion equation
   11,453.69 : 15,811.61 = 7,206.81 : x
2. Step 2: Convert to fraction form
   11,453.69/15,811.61 = 7,206.81/x
3. Step 3: Cross multiply
   11,453.69x = 15,811.61 × 7,206.81
4. Step 4: Simplify right side
   11,453.69x = 113,951,233.03
5. Step 5: Solve for x
   x = 113,951,233.03/11,453.69
6. Step 6: Final answer
   x = 9,948.87