Finding the Fourth Proportional to 11,610.54, 17,417.03 and 7,687.31

Step by Step Solution

1. Step 1: Write the proportion equation
   11,610.54 : 17,417.03 = 7,687.31 : x
2. Step 2: Convert to fraction form
   11,610.54/17,417.03 = 7,687.31/x
3. Step 3: Cross multiply
   11,610.54x = 17,417.03 × 7,687.31
4. Step 4: Simplify right side
   11,610.54x = 133,889,983.37
5. Step 5: Solve for x
   x = 133,889,983.37/11,610.54
6. Step 6: Final answer
   x = 11,531.76