Finding the Fourth Proportional to 11,780.72, 16,245.06 and 8,791.76

Step by Step Solution

1. Step 1: Write the proportion equation
   11,780.72 : 16,245.06 = 8,791.76 : x
2. Step 2: Convert to fraction form
   11,780.72/16,245.06 = 8,791.76/x
3. Step 3: Cross multiply
   11,780.72x = 16,245.06 × 8,791.76
4. Step 4: Simplify right side
   11,780.72x = 142,822,668.71
5. Step 5: Solve for x
   x = 142,822,668.71/11,780.72
6. Step 6: Final answer
   x = 12,123.42