Finding the Fourth Proportional to 12,091.76, 16,689.89 and 7,311.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,091.76 : 16,689.89 = 7,311.79 : x
2. Step 2: Convert to fraction form
   12,091.76/16,689.89 = 7,311.79/x
3. Step 3: Cross multiply
   12,091.76x = 16,689.89 × 7,311.79
4. Step 4: Simplify right side
   12,091.76x = 122,033,005.47
5. Step 5: Solve for x
   x = 122,033,005.47/12,091.76
6. Step 6: Final answer
   x = 10,092.25