Finding the Fourth Proportional to 11,538.69, 15,917.69 and 7,231.01

Step by Step Solution

1. Step 1: Write the proportion equation
   11,538.69 : 15,917.69 = 7,231.01 : x
2. Step 2: Convert to fraction form
   11,538.69/15,917.69 = 7,231.01/x
3. Step 3: Cross multiply
   11,538.69x = 15,917.69 × 7,231.01
4. Step 4: Simplify right side
   11,538.69x = 115,100,859.82
5. Step 5: Solve for x
   x = 115,100,859.82/11,538.69
6. Step 6: Final answer
   x = 9,975.21