Finding the Fourth Proportional to 11,960.96, 16,510.72 and 8,985.43

Step by Step Solution

1. Step 1: Write the proportion equation
   11,960.96 : 16,510.72 = 8,985.43 : x
2. Step 2: Convert to fraction form
   11,960.96/16,510.72 = 8,985.43/x
3. Step 3: Cross multiply
   11,960.96x = 16,510.72 × 8,985.43
4. Step 4: Simplify right side
   11,960.96x = 148,355,836.26
5. Step 5: Solve for x
   x = 148,355,836.26/11,960.96
6. Step 6: Final answer
   x = 12,403.34