Finding the Fourth Proportional to 8,691.82, 11,990.27 and 5,499.74

Step by Step Solution

1. Step 1: Write the proportion equation
   8,691.82 : 11,990.27 = 5,499.74 : x
2. Step 2: Convert to fraction form
   8,691.82/11,990.27 = 5,499.74/x
3. Step 3: Cross multiply
   8,691.82x = 11,990.27 × 5,499.74
4. Step 4: Simplify right side
   8,691.82x = 65,943,321.33
5. Step 5: Solve for x
   x = 65,943,321.33/8,691.82
6. Step 6: Final answer
   x = 7,586.83