Finding the Fourth Proportional to 11,887.73, 17,806.06 and 7,715.56

Step by Step Solution

1. Step 1: Write the proportion equation
   11,887.73 : 17,806.06 = 7,715.56 : x
2. Step 2: Convert to fraction form
   11,887.73/17,806.06 = 7,715.56/x
3. Step 3: Cross multiply
   11,887.73x = 17,806.06 × 7,715.56
4. Step 4: Simplify right side
   11,887.73x = 137,383,596.69
5. Step 5: Solve for x
   x = 137,383,596.69/11,887.73
6. Step 6: Final answer
   x = 11,556.76