Finding the Fourth Proportional to 11,667.09, 16,103.07 and 7,688.55

Step by Step Solution

1. Step 1: Write the proportion equation
   11,667.09 : 16,103.07 = 7,688.55 : x
2. Step 2: Convert to fraction form
   11,667.09/16,103.07 = 7,688.55/x
3. Step 3: Cross multiply
   11,667.09x = 16,103.07 × 7,688.55
4. Step 4: Simplify right side
   11,667.09x = 123,809,258.85
5. Step 5: Solve for x
   x = 123,809,258.85/11,667.09
6. Step 6: Final answer
   x = 10,611.84