Finding the Fourth Proportional to 8,081.86, 12,120.36 and 5,308.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,081.86 : 12,120.36 = 5,308.42 : x
2. Step 2: Convert to fraction form
   8,081.86/12,120.36 = 5,308.42/x
3. Step 3: Cross multiply
   8,081.86x = 12,120.36 × 5,308.42
4. Step 4: Simplify right side
   8,081.86x = 64,339,961.43
5. Step 5: Solve for x
   x = 64,339,961.43/8,081.86
6. Step 6: Final answer
   x = 7,961.03