Finding the Fourth Proportional to 8,082.86, 12,121.86 and 5,309.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,082.86 : 12,121.86 = 5,309.42 : x
2. Step 2: Convert to fraction form
   8,082.86/12,121.86 = 5,309.42/x
3. Step 3: Cross multiply
   8,082.86x = 12,121.86 × 5,309.42
4. Step 4: Simplify right side
   8,082.86x = 64,360,045.92
5. Step 5: Solve for x
   x = 64,360,045.92/8,082.86
6. Step 6: Final answer
   x = 7,962.53