Finding the Fourth Proportional to 11,780.89, 16,272.05 and 8,809.94

Step by Step Solution

1. Step 1: Write the proportion equation
   11,780.89 : 16,272.05 = 8,809.94 : x
2. Step 2: Convert to fraction form
   11,780.89/16,272.05 = 8,809.94/x
3. Step 3: Cross multiply
   11,780.89x = 16,272.05 × 8,809.94
4. Step 4: Simplify right side
   11,780.89x = 143,355,784.18
5. Step 5: Solve for x
   x = 143,355,784.18/11,780.89
6. Step 6: Final answer
   x = 12,168.50