Finding the Fourth Proportional to 12,099.57, 18,146.31 and 4,306.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,099.57 : 18,146.31 = 4,306.56 : x
2. Step 2: Convert to fraction form
   12,099.57/18,146.31 = 4,306.56/x
3. Step 3: Cross multiply
   12,099.57x = 18,146.31 × 4,306.56
4. Step 4: Simplify right side
   12,099.57x = 78,148,082.06
5. Step 5: Solve for x
   x = 78,148,082.06/12,099.57
6. Step 6: Final answer
   x = 6,458.75