Finding the Fourth Proportional to 11,965.82, 16,509.98 and 8,988.75

Step by Step Solution

1. Step 1: Write the proportion equation
   11,965.82 : 16,509.98 = 8,988.75 : x
2. Step 2: Convert to fraction form
   11,965.82/16,509.98 = 8,988.75/x
3. Step 3: Cross multiply
   11,965.82x = 16,509.98 × 8,988.75
4. Step 4: Simplify right side
   11,965.82x = 148,404,037.78
5. Step 5: Solve for x
   x = 148,404,037.78/11,965.82
6. Step 6: Final answer
   x = 12,402.33