Finding the Fourth Proportional to 8,082.45, 12,111.29 and 5,440.18

Step by Step Solution

1. Step 1: Write the proportion equation
   8,082.45 : 12,111.29 = 5,440.18 : x
2. Step 2: Convert to fraction form
   8,082.45/12,111.29 = 5,440.18/x
3. Step 3: Cross multiply
   8,082.45x = 12,111.29 × 5,440.18
4. Step 4: Simplify right side
   8,082.45x = 65,887,597.63
5. Step 5: Solve for x
   x = 65,887,597.63/8,082.45
6. Step 6: Final answer
   x = 8,151.94