Finding the Fourth Proportional to 8,109.75, 12,148.89 and 5,327.99

Step by Step Solution

1. Step 1: Write the proportion equation
   8,109.75 : 12,148.89 = 5,327.99 : x
2. Step 2: Convert to fraction form
   8,109.75/12,148.89 = 5,327.99/x
3. Step 3: Cross multiply
   8,109.75x = 12,148.89 × 5,327.99
4. Step 4: Simplify right side
   8,109.75x = 64,729,103.69
5. Step 5: Solve for x
   x = 64,729,103.69/8,109.75
6. Step 6: Final answer
   x = 7,981.64