Finding the Fourth Proportional to 11,556.87, 17,307.96 and 7,161

Step by Step Solution

1. Step 1: Write the proportion equation
   11,556.87 : 17,307.96 = 7,161 : x
2. Step 2: Convert to fraction form
   11,556.87/17,307.96 = 7,161/x
3. Step 3: Cross multiply
   11,556.87x = 17,307.96 × 7,161
4. Step 4: Simplify right side
   11,556.87x = 123,942,301.56
5. Step 5: Solve for x
   x = 123,942,301.56/11,556.87
6. Step 6: Final answer
   x = 10,724.56